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List of Freshwater Fishes reported from Papua New Guinea
n = 366
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Table 1: 357 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 6 species possibly present in the country/island (stray, questionable);
Table 3: 3 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 366 species reported from the country/island altogether.
Table : 366 .
     
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Family Species Author Info Occurrence Common names Abundance Max length Maturity Remark Photo
Eleotridae Allomogurnda flavimarginata Allen, 2003 Fr native   6.10 cm SL male/unsexed  Found only in the vinicity of Bulolo and Wau (Ref. 77038). 
Eleotridae Allomogurnda hoesei Allen, 2003 Fr native   7.80 cm SL male/unsexed  Known only from a single collection taken in 1968 near the village of Ialibu, Southern Highlands Province (Ref. 77038). 
Eleotridae Allomogurnda insularis Allen, 2003 Fr native   5.47 cm SL male/unsexed  Found only in two streams on the Goodenough Island in the D'Entrecasteaux Islands of eastern Papu New Guinea (Ref. 77038). 
Eleotridae Allomogurnda landfordorum Allen, 2003 Fr native   5.85 cm SL male/unsexed  Known only from two ares in southern drainages of Papua New Guinea, separated by a distance of approximately 240 km. Fish samples were collected from a small spring next to the Lubu River of the Kikori River system, located in hilly terrain, approximately 150 km upstream from the mouth of the Kikori River at an elevation of about 600 m (Ref. 77038). 
Eleotridae Allomogurnda montana Allen, 2003 Fr native   6.10 cm SL male/unsexed  Presently known only from the upper Awaetowa River on Fergusson Island in the D' Entrecasteaux Islands of eastern Papau New Guinea (Ref. 77038). 
Eleotridae Allomogurnda multicincta Allen & Hoese, 2017 Fr native   3.60 cm SL male/unsexed  Type locality of Allomogurnda multicincta, East Sepik Province, about 17 km east of Maprik Village on Wewak-Lumi Road, Malas Creek. Known only from East Sepik Province, where it was collected in a small tributary (Malas Creek) of the Amuk River (tributary of the Screw River, one of the major northern tributaries of the Middle Sepik River drainage), located about 17 km east of Maprik Village via the Wewak-Lumi Road. The type locality is located at the edge of the foothills of the Prince Alexander Mountains, elevation of about 150 m above sea level and lies approximately 455 km upstream from the Pacific Ocean (Ref. 116997).  No picture yet.
Eleotridae Allomogurnda nesolepis (Weber, 1907) Fr native  common (usually seen) 4.60 cm SL male/unsexed  Known from Markham, Gogol, Ramu and Sepik river systems. Also found in numerous small, independent coastal drainages between these rivers. Also Ref. 6771, 13533. 
Eleotridae Allomogurnda papua Allen, 2003 Fr native   11.70 cm SL male/unsexed  Occurs in eastern Papua New Guinea from the Huon Gulf near Lae to the Laloki River system near Port Moresby (Ref. 77038). Found both in lowland streams near the coast and well inland to elevations of about 500 m in Sogeri Plateau near Port Moresby and Kokoda vicinity (Ref. 77038). 
Ambassidae Ambassis agrammus Günther, 1867 Fr native  Pale river perchlet (English)  7.50 cm SL male/unsexed 3 SL Recorded from Bensbach and Fly-Strickland river systems. Found also in Daru Island. Also Ref. 5259, 6192, 6771, 7300,13533, 50786, 75154. 
Ambassidae Ambassis interrupta Bleeker, 1853 Fr, Br, M native  Perchlet (English), Glassfish (English), Long-spined perchlet (English) common (usually seen) 12.00 cm TL male/unsexed 7 SL Known from Wewak, Manus Island, Madang and from the lower Sepik, Ramu, Fly and Oriomo rivers. Common in the lower section of the Sepik River and occurs as far upstream as Pagwi, about 200 km from the river mouth (Ref. 7242). Also Ref. 6192, 13533. 
Ambassidae Ambassis macleayi (Castelnau, 1878) Fr native  Macleay's perchlet (English)  9.00 cm SL male/unsexed 3 SL Known from Bensbach, Middle Fly and lower Strickland (including Lake Murray) rivers, and also from the Balimo area. Also Ref. 6192, 13533, 75154. 
Ambassidae Ambassis macracanthus Bleeker, 1849 Fr, Br native  Estuarine perchlet (English)  10.50 cm SL male/unsexed  Known only from Madang. Also Ref. 1601 and 6192. 
Ambassidae Ambassis miops Günther, 1872 Fr, Br native  Flag-tailed perchlet (English)  10.30 cm TL male/unsexed  Known from Vailala Creek (near Port Moresby), streams near Bogia, Lorengau River on Manus Island and near Kavieng, New Ireland. Also Ref. 6192 and 7050. 
Ambassidae Ambassis nalua (Hamilton, 1822) Fr native  Scalloped perchlet (English)  12.50 cm TL male/unsexed  In range Ref. 7050. 
Ambassidae Ambassis urotaenia Bleeker, 1852 Fr, Br, M native   14.00 cm TL male/unsexed   
Ambassidae Ambassis vachellii Richardson, 1846 Fr, Br, M native   6.50 cm SL male/unsexed   
Terapontidae Amniataba affinis (Mees & Kailola, 1977) Fr endemic   15.00 cm SL male/unsexed  Thus far known only from the Fly, Morehead and Bensbach river systems. Widespread in the Fly system, occurring in the lowland, swampy parts of the river as far upstream as the Ok Mart River near Rumginae (about 870 km upstream from the sea). Also Ref. 6192, 13533.  No picture yet.
Anabantidae Anabas testudineus (Bloch, 1792) Fr introduced  Climbing perch (English)  25.00 cm TL male/unsexed  Established in Sepik area (Ref. 6993) and in the extreme southwest corner of the country (Ref. 50786). Also Ref. 9420. 
Anguillidae Anguilla bicolor McClelland, 1844 Fr, Br, M native  Indian short-finned eel (English)  123 cm TL male/unsexed  Known from northern river systems, particularly the Sepik and Ramu (Ref. 2847). Also Ref. 6993, 13533, 129076. 
Anguillidae Anguilla interioris Whitley, 1938 Fr native  New Guinea eel (English), Highlands long-finned eel (English)  80.00 cm TL male/unsexed   
Anguillidae Anguilla marmorata Quoy & Gaimard, 1824 Fr, Br, M native  Giant long-finned eel (English)  70.00 cm TL male/unsexed ;200 cm TL female  Known from the streams of south-eastern Papua New Guinea near Port Moresby (Ref. 2847); and Sepik-Ramu river (Ref. 13533). Also Ref. 6993, 13533. 
Anguillidae Anguilla megastoma Kaup, 1856 Fr native  Pacific long-finned eel (English)  100.00 cm TL male/unsexed ;165 cm SL female  Recorded from streams of Popondetta and Kairiru Island, just northwest of Wewak. Also Ref. 6993. 
Anguillidae Anguilla obscura Günther, 1872 Fr, Br, M native  Pacific short-finned eel (English)  110 cm TL male/unsexed  Known from the Port Moresby region, Embi Lakes near Popondetta, Madang area, Sepik River (Ref. 2847); and Fly river (Ref. 13533). Also Ref. 6993, 75154. 
Anguillidae Anguilla reinhardtii Steindachner, 1867 Fr, Br, M native   165 cm TL male/unsexed ;158 cm TL female  Known from Dinawa (Upper Saint Joseph River, Gulf of Papua drainage) (Ref. 2847); and Fly river (Ref. 13533). Also Ref. 6993. 
Hemiramphidae Arrhamphus sclerolepis Günther, 1866 Fr, Br, M native  Snub-nosed garfish (English) abundant (always seen in some numbers) 36.00 cm SL male/unsexed  Reported from the Daru area, Galley reach and Port Moresby. Widespread along the Papuan coast. Occurs near the mouth of the Fly River (Ref. 13533). Also Ref. 9843, 75154. 
Gobiidae Awaous acritosus Watson, 1994 Fr native   18.00 cm SL male/unsexed    No picture yet.
Gobiidae Awaous guamensis (Valenciennes, 1837) Fr native   24.51 cm SL male/unsexed ;16.53 cm female   
Gobiidae Awaous melanocephalus (Bleeker, 1849) Fr native   15.00 cm TL male/unsexed  Recorded from streams of northern Papua New Guinea between Lae and Madang. 
Eleotridae Belobranchus belobranchus (Valenciennes, 1837) Fr, Br native  Throat-spine gudgeon (English)  19.50 cm TL male/unsexed  Also Ref. 6771, 7050, 1601.  No picture yet.
Oxudercidae Boleophthalmus boddarti (Pallas, 1770) Fr, Br, M native  Boddart's goggle-eyed goby (English)  22.00 cm TL male/unsexed   
Oxudercidae Boleophthalmus caeruleomaculatus McCulloch & Waite, 1918 Fr questionable   16.50 cm SL male/unsexed  Reported occurrence in Ref. 6771 needs furtehr confirmation (Ref. 75154). 
Butidae Bostrychus strigogenys Nichols, 1937 Fr native  Striped-cheek gudgeon (English)  18.30 cm SL male/unsexed  Known from the upper Fly and Ok Tedi rivers (Ref. 2847). Also Ref. 6771, 13533.  No picture yet.
Butidae Bostrychus zonatus Weber, 1907 Fr, Br native   18.50 cm SL male/unsexed  Recorded from Mari Creek and Tais village (near Daru), western Papua. 
Soleidae Brachirus villosus (Weber, 1907) Fr native  Velvety sole (English)  10.50 cm SL male/unsexed  Occurs in the Fly River, penetrating well upstream at least 900 km from the mouth. Also Ref. 6771, 13533.  No picture yet.
Gobiidae Brachyamblyopus brachysoma (Bleeker, 1854) Fr, Br native   10.50 cm TL male/unsexed  Recorded from Empress Augusta Bay, Bougainville. Also from Ref. 92840.  No picture yet.
Ariidae Brustiarius nox (Herre, 1935) Fr, Fi endemic  Comb-gilled catfish (English) abundant (always seen in some numbers) 30.00 cm SL male/unsexed 16 SL Found in the lower and middle Sepik and Ramu river systems. Also Ref. 6993, 13533.  No picture yet.
Ariidae Brustiarius solidus (Herre, 1935) Fr, Fi native  Hard-plate catfish (English), Kanganaman catfish (English) fairly common (chances are about 50%) 60.00 cm SL male/unsexed 20 SL Known from the lower and middle Ramu and Sepik river sytems. Also Ref. 6771, 6993, 9233, 13533.  No picture yet.
Eleotridae Bunaka gyrinoides (Bleeker, 1853) Fr native  Green-backed gauvina (English)  34.00 cm SL male/unsexed  Known from Gogol and Ramu river systems. Also occurs in the Admiralty Is. and Sepik-Ramu river (Ref. 13533). Also Ref. 6771. 
Butidae Butis amboinensis (Bleeker, 1853) Fr, Br, M native  Olive flathead-gudgeon (English)  14.00 cm SL male/unsexed  In the Sepik River it has been captured 300 km upstream from the sea; also known from Ramu river (Ref. 13533). 
Butidae Butis butis (Hamilton, 1822) Fr, Br native  Crimson-tipped gudgeon (English)  15.00 cm TL male/unsexed  Known from Fly river (Ref. 13533). Also Ref. 6771. 
Butidae Butis melanostigma (Bleeker, 1849) Fr, Br native   18.00 cm TL male/unsexed  Also Ref. 1601. Occurrence questionable (Ref. 6771). 
Gobiidae Caragobius urolepis (Bleeker, 1852) Fr, Br native   8.50 cm SL male/unsexed  Recorded from the Ramu, Fly and Oriomo rivers (Ref. 2847). Also recorded from the Sepik and Rau R. systems (Ref. 6771). Also Ref. 13533. 
Carangidae Caranx sexfasciatus Quoy & Gaimard, 1825 Fr, Br, M, Fi native  Bigeye trevally (English), Babakulan (Creole, English), Dan-Dau (Creole, English), Muslo (Creole, English), Pinkit (Creole, English), Simbad (Creole, English), Great trevally (English), Tupatupa (Misima-Paneati)  120 cm TL male/unsexed  Adults are strictly marine inhabitants. Juveniles occur in brackish mangrove estuaries and sometimes enter rivers, penetrating well inland, for example 200-300 km up the Sepik River (Ref. 2847) and Ramu river (Ref. 13533); known from Kimbe bay (Ref. 28888). Also Ref. 3280 and 6192. 
Carcharhinidae Carcharhinus leucas (Valenciennes, 1839) Fr, Br, M native  Bull shark (English)  360 cm TL male/unsexed ;400 cm TL female  Recorded from the Papuan coast (Ref. 6993). Freshwater localities include Sepik, Ramu (Ref. 2847) and Fly rivers (Ref. 13533). Also Ref. 6993, 9997, 50786. 
Mugilidae Cestraeus goldiei (Macleay, 1883) Fr, Br native   40.00 cm FL male/unsexed  Mostly recorded from Port Moresby district. Also Ref. 9812. 
Mugilidae Cestraeus plicatilis Valenciennes, 1836 Fr, Br native  Goldie river mullet (English)  32.50 cm TL male/unsexed   
Channidae Channa striata (Bloch, 1793) Fr introduced   100.00 cm SL male/unsexed  Two specimens observed by G. Hitchcock in August 2000 at Balamuk and Wando villagers (Ref. 50786). 
Chanidae Chanos chanos (Fabricius, 1775) Fr, Br, M, Fi native   180 cm SL male/unsexed ;124 cm SL female  Known from Kimbe bay (Ref. 28888) and Sepik-Ramu river (Ref. 13533). Also Ref. 49, 6993, 28888. 
Melanotaeniidae Chilatherina axelrodi Allen, 1979 Fr endemic  Axelrod's rainbowfish (English)  7.00 cm SL male/unsexed  Known only from Yungkiri Stream, a tributary of the Pual River, in the Bewani Mountains, about 37 km southwest of Vanimo. Also Ref. 6993.  No picture yet.
Melanotaeniidae Chilatherina bulolo (Whitley, 1938) Fr endemic   7.00 cm SL male/unsexed  Known from scattered localities in the Markham (Erap Snake and Bulolo rivers), Ramu (Whege River) (Ref. 2847, 6771) and Sepik River systems (Ref. 13533).  No picture yet.
Melanotaeniidae Chilatherina campsi (Whitley, 1957) Fr endemic  Highlands rainbowfish (English)  7.50 cm SL male/unsexed  Known from widely scattered localities in the Markham, Ramu, Sepik and Purari river systems. Also Ref. 6993, 13533.  No picture yet.
Melanotaeniidae Chilatherina crassispinosa (Weber, 1913) Fr native  Stiff-rayed rainbowfish (English)  11.00 cm SL male/unsexed ;9.00 cm SL female  Known from Markham, Gogol, Ramu, Sepik and Pual rivers. Also Ref. 6993, 13533.  No picture yet.
Melanotaeniidae Chilatherina fasciata (Weber, 1913) Fr native  Barred rainbowfish (English)  11.00 cm SL male/unsexed  Known from the Markham, Ramu and Sepik river systems. Also Ref. 6993, 13533. 
Melanotaeniidae Chilatherina lorentzii (Weber, 1907) Fr native  Lorentz' rainbowfish (English)  10.00 cm SL male/unsexed  Known from Puive Creek, a tributary of the Pual River near Vanimo. Also Ref. 6993.  No picture yet.
Melanotaeniidae Chilatherina pagwiensis Allen & Unmack, 2012 Fr native    Known from the Sepik River (Ref. 93037).  No picture yet.
Ariidae Cinetodus carinatus (Weber, 1913) Fr native  Comb-spined catfish (English)  40.00 cm SL male/unsexed  Known from the middle and lower reaches of the Fly River. Also Ref. 6993, 13533.  No picture yet.
Ariidae Cinetodus crassilabris (Ramsay & Ogilby, 1886) Fr endemic  Thick-lipped catfish (English)  50.00 cm SL male/unsexed  Thus far known from the Purari and Fly-Strickland river systems, but certainly more widespread. In the Fly river system, it is found in lowland areas of the upper part of the river, at least as far upstream as about 900 km from the mouth. Also Ref. 13533.  No picture yet.
Ariidae Cinetodus froggatti (Ramsay & Ogilby, 1886) Fr native  Frogatt's catfish (English)  48.00 cm SL male/unsexed  Known from the Purari and Fly-Strickland river systems. Also Ref. 6993, 13533, 75154. 
Clariidae Clarias batrachus (Linnaeus, 1758) Fr introduced   47.00 cm TL male/unsexed  Known from the Lake Sentani region, Vogelkop Peninsula on the Prafi Plain near Manokwari, in the Sorong district (Ref. 2847) and in Western Province (Ref. 50786). Also Ref. 9420. 
Ehiravidae Clupeoides papuensis (Ramsay & Ogilby, 1886) Fr native  Toothed river-herring (English)  8.00 cm SL male/unsexed  Known from Fly and Strickland rivers. In the Fly system, it is found in lowland streams and has been collected at sites ranging from 264 km to 905 km upstream from the sea. Also Ref. 188, 6993, 13533. 
Ehiravidae Clupeoides venulosus Weber & de Beaufort, 1912 Fr native  River sprat (English)  9.00 cm SL male/unsexed  Known from the Fly River system at distances between 900 and 934 km upstream from the sea at elevations from 50-500 m. Also Ref. 188, 6993, 13533. 
Ariidae Cochlefelis danielsi (Regan, 1908) Fr native  Daniel's catfish (English)  45.00 cm SL male/unsexed  Known from the Purari and Fly rivers. Found in the middle part of the Fly system at least as far as 675 km upstream from the river mouth. Also Ref. 6993, 13533. 
Ariidae Cochlefelis spatula (Ramsay & Ogilby, 1886) Fr native  Duck-billed catfish (English)  60.00 cm SL male/unsexed  Known from the Purari and Fly-Strickland rivers. In the Fly system, it is found in the middle and upper sections, as far as about 900 km upstream from the sea. Also Ref. 6993, 13533.  No picture yet.
Cichlidae Coptodon rendalli (Boulenger, 1897) Fr, Br introduced   45.00 cm TL male/unsexed   
Atherinidae Craterocephalus kailolae Ivantsoff, Crowley & Allen, 1987 Fr endemic   6.00 cm SL male/unsexed  Known only from creeks near Safia in eastern Papua New Guinea on the northern side of the Owen Stanley Range. Also Ref. 6376 and 6771.  No picture yet.
Atherinidae Craterocephalus lacustris Trewavas, 1940 Fr endemic  Kutubu hardyhead (English), Lake Kutubu hardyhead (English) abundant (always seen in some numbers) 14.00 cm TL male/unsexed  Known only from Lake Kutubu and its outlet stream, the Soro River. Also Ref. 6376 and 6993.  No picture yet.
Atherinidae Craterocephalus nouhuysi (Weber, 1910) Fr native   10.00 cm SL male/unsexed  Known from the Upper Fly-Strickland River system. Also Ref. 13533.  No picture yet.
Atherinidae Craterocephalus pimatuae Crowley, Ivantsoff & Allen, 1991 Fr endemic  Pima hardyhead (English) scarce (very unlikely)  Known only from a single collection near the junction of the Pima and Tua rivers, mountainous tributaries of the Purari River in the Central Highlands.  No picture yet.
Atherinidae Craterocephalus randi Nichols & Raven, 1934 Fr native  Kubuna River hardyhead (English)  8.00 cm SL male/unsexed  Known from Kubuna River (about 80 km north-west of Port Moresby), Balimo Lagoon, and the upper Fly-Strickland, Morehead and Bensbach rivers. Also Ref. 6993, 13533.  No picture yet.
Mugilidae Crenimugil buchanani (Bleeker, 1853) Fr, Br, M native  Blue-tail mullet (English), Bluetail mullet (English), Waloya (Misima-Paneati)  100.00 cm TL male/unsexed  Found in coastal seas. Young fish occur frequently in estuaries and also ascend rivers and coastal creeks (Ref. 2847) ; Kimbe bay (Ref. 28888). 
Mugilidae Crenimugil heterocheilos (Bleeker, 1855) Fr, Br, M native  Fringe-lipped mullet (English)  50.00 cm SL male/unsexed  Recorded from the Fly and Kemp Welsh rivers of southern Papua New Guinea. Found throughout the lower and middle sections of the Fly, and also penetrates the Upper Fly at least 900 km upstream from the mouth. Also Ref. 6192, 13533. 
Cynoglossidae Cynoglossus heterolepis Weber, 1910 Fr native   25.00 cm SL male/unsexed  Known from the Fly and Oriomo rivers (Ref. 2847). Also Ref. 5297, 6771, 13533.  No picture yet.
Cyprinidae Cyprinus carpio Linnaeus, 1758 Fr, Aq introduced  common (usually seen) 120 cm TL male/unsexed  Common in a few isolated localities such as Lake Kopiago, and the Lower and Middle Sepik and Ramu river systems. Also Ref. 1739, 6349. 
Lobotidae Datnioides campbelli Whitley, 1939 Fr, Br native   32.00 cm SL male/unsexed  Known from the Gulf of Papua drainages, Balimo Lagoon, Fly and Oriomo rivers. 
Lobotidae Datnioides polota (Hamilton, 1822) Fr, Br, M native  Four-banded triple-tail (English)  30.00 cm SL male/unsexed  Recorded from Fly and Oriomo rivers and Balimo Lagoon (Ref. 2847, 13533). Reported from the area between Lorentz R. and the Era R. Ref. 6192. 
Ambassidae Denariusa australis (Steindachner, 1867) Fr native   4.50 cm SL male/unsexed  Known only from the Bensbach River and Fly River system. Also Ref. 6192, 13533.  No picture yet.
Tetraodontidae Dichotomyctere erythrotaenia (Bleeker, 1853) Fr, Br, M native   8.50 cm TL male/unsexed  Recorded near Toro Pass, Fly River delta. Also Ref. 13533. 
Gobiidae Drombus globiceps (Hora, 1923) Fr native   4.30 cm TL male/unsexed  Recorded from Bristow Is.  No picture yet.
Eleotridae Eleotris aquadulcis Allen & Coates, 1990 Fr endemic   25.00 cm SL male/unsexed  Known only from the Sepik and Ramu rivers. Mostly found in floodplain lakes. Has been recorded as far upstream as Chambri Lakes, about 300 km from the Sepik River mouth. Also Ref. 6771, 13533.  No picture yet.
Eleotridae Eleotris fusca (Forster, 1801) Fr, Br, M native  Brown gudgeon (English)  26.00 cm TL male/unsexed  Know from Fly river (Ref. 13533). Also Ref. 6771, 1601. 
Eleotridae Eleotris melanosoma Bleeker, 1853 Fr native  Black gudgeon (English)  26.00 cm SL male/unsexed  Known from Sepik-Ramu river (Ref. 13533). Also Ref. 2847. 
Epinephelidae Epinephelus polystigma (Bleeker, 1853) Fr, Br native   48.00 cm TL male/unsexed  Museum: Port Moresby, AMS I.9462; KFRS F04037. Popondetta District, mangrove creek flowing to Oro Bay, USNM 272475. New Britain, BMNH 1883.3.11.1. Also Ref.: 4787, 90102, 89707 and 5222. 
Dorosomatidae Escualosa thoracata (Valenciennes, 1847) Fr, Br, M native  Deep-bodied herring (English)  10.00 cm SL male/unsexed  Recorded from the lower Ramu River, about 40 km upstream from the sea (Ref. 2847) and lower Sepik River (Ref. 13533). Also Ref. 188. 
Apogonidae Fibramia amboinensis (Bleeker, 1853) Fr, Br native  Amboina cardinalfish (English) occasional (usually not seen) 7.00 cm SL male/unsexed  Occurs in brackishwaters, 2-5 m depth (Ref. 11890). Moves into fresh water at low tide (Ref. 2847). Also Ref. 559, 6192, 93839. 
Poeciliidae Gambusia affinis (Baird & Girard, 1853) Fr, Br introduced  Mosquitofish (English)  5.10 cm TL male/unsexed ;7.00 cm TL female  Known from the Sepik and Ramu systems, Lake Kutubu, and around major population centers of Papua New Guinea such as Port Moresby, Lae and Madang (Ref. 2847). Also Ref. 1739. 
Gerreidae Gerres filamentosus Cuvier, 1829 Fr, Br, M, Fi native  Threadfin silver-biddy (English)  39.00 cm TL male/unsexed  Occurs in shallow coastal seas. Juveniles are found in brackish mangrove estuaries amd sometimes penetrate fresh water. Also Ref. 1602 and 6192. 
Eleotridae Giuris margaritaceus (Valenciennes, 1837) Fr native  Snake-headed gudgeon (English)  29.00 cm TL male/unsexed  Known from the Sepik region (Ref. 44894). Common throughout the lower altitudes of the Sepik River basin; known also from Ramu river (Ref. 13533) . Also Ref. 5259, 2847, 6771. 
Apogonidae Glossamia abo (Herre, 1935) Fr native    Type locality: Sepik River at Koragu, New Guinea (Ref. 46206).  No picture yet.
Apogonidae Glossamia aprion (Richardson, 1842) Fr native  Mouth almighty (English)  18.00 cm SL male/unsexed  Collected from the Upper and Middle Fly (including Lake Murray), Oriomo and Bensbach rivers. Also Ref. 6192, 7300, 13533, 75154. 
Apogonidae Glossamia gjellerupi (Weber & de Beaufort, 1929) Fr native  Gjellerup's cardinalfish (English)  16.00 cm SL male/unsexed  Known from Markham, Gogol, Ramu and Sepik rivers. Also Ref. 6192, 13533.  No picture yet.
Apogonidae Glossamia narindica Roberts, 1978 Fr endemic  Slender mouth almighty (English)  12.50 cm SL male/unsexed  Known only from 11 specimens collected from Bensbach and middle Fly rivers. Also Ref. 6192, 13533.  No picture yet.
Apogonidae Glossamia sandei (Weber, 1907) Fr native   19.00 cm SL male/unsexed  Mostly recorded from Purari, Fly and Strickland rivers. Also Ref. 6192, 13533.  No picture yet.
Apogonidae Glossamia trifasciata (Weber, 1913) Fr native   10.00 cm SL male/unsexed  Known from the Fly-Strickland system. Also Ref. 6192, 13533.  No picture yet.
Apogonidae Glossamia wichmanni (Weber, 1907) Fr native  Wichmann's cardinalfish (English)  18.00 cm SL male/unsexed  Collected from Luap Creek (Ref. 2847). Recorded from coastal rivers west of Wewak, from the Sepik R., near Madang and even near Bulolo, from the P.N.G. border to the Markham R. (Ref. 6192).  No picture yet.
Gobiidae Glossogobius aureus Akihito & Meguro, 1975 Fr native   25.00 cm SL male/unsexed  Known from a creek near Wewak, northern Papua New Guinea (Ref. 2847). Also from the Fly and Strickland R. systems (Ref. 6771). 
Gobiidae Glossogobius bicirrhosus (Weber, 1894) Fr native   9.00 cm SL male/unsexed  Recorded from Madang, north of Maiwara R. 
Gobiidae Glossogobius brunnoides (Nichols, 1951) Fr native  Dusky mountain goby (English), Naked-breasted goby (English)  10.00 cm SL male/unsexed  Occurs in mountainous headwaters of the Purari River system. Collection sites include the Asaro River near Goroka, and tributaries of the Wahgi River near Mount Hagen (Ref. 2847). Also Ref. 6771.  No picture yet.
Gobiidae Glossogobius bulmeri Whitley, 1959 Fr native  Bulmer's goby (English)  10.00 cm SL male/unsexed  Known from Asaro River near Goroka in the Eastern Highland Province, from Sepik River and from Bewani Mountains (Ref. 2847); and Ramu river (Ref. 13533). Also Ref. 6771.  No picture yet.
Gobiidae Glossogobius celebius (Valenciennes, 1837) Fr, Br native   14.00 cm SL male/unsexed  Known from Milne Bay, Oro Bay, Lae, Madang, Bogia, Wewak, the Fly River mouth, Manus Island, New Ireland and Bougainville. Also Ref. 13533. 
Gobiidae Glossogobius circumspectus (Macleay, 1883) Fr, Br native   35.00 cm TL male/unsexed  Collected from Madang, Milne Bay, Bristow Island and the Fly River. Also Ref. 75154. 
Gobiidae Glossogobius clitellus Hoese & Allen, 2012 Fr native   8.60 cm SL male/unsexed    No picture yet.
Gobiidae Glossogobius coatesi Hoese & Allen, 1990 Fr endemic   10.00 cm SL male/unsexed  Known from the middle and lower Sepik and Ramu river systems (Ref. 2847). Also Ref. 6771.  No picture yet.
Gobiidae Glossogobius concavifrons (Ramsay & Ogilby, 1886) Fr native   12.00 cm SL male/unsexed  Known from the Fly-Strickland river system. Common in the Upper Fly at distances of about 800-970 km upsteam from the sea. Also Ref. 5259, 6771, 13533.  No picture yet.
Gobiidae Glossogobius giuris (Hamilton, 1822) Fr native  Flat-headed goby (English)  50.00 cm SL male/unsexed  Recorded from Maiwara (extreme eastern tip of Papua New Guinea), Port Moresby, Murnass River near Madang and the Lower Ramu River (Ref. 2847); also known from Fly, Sepik-Ramu river systems (Ref. 13533). Also Ref. 6771. 
Gobiidae Glossogobius koragensis Herre, 1935 Fr native   25.00 cm male/unsexed  Known from Sepik and Ramu river systems (Ref. 2847). Also Ref. 6771. 
Gobiidae Glossogobius macrocephalus Hoese & Allen, 2015 Fr endemic   11.20 cm SL male/unsexed    No picture yet.
Gobiidae Glossogobius multipapillus Hoese & Allen, 2015 Fr endemic   5.60 cm SL male/unsexed ;5.40 cm SL female    No picture yet.
Gobiidae Glossogobius munroi Hoese & Allen, 2012 Fr native      No picture yet.
Gobiidae Glossogobius muscorum Hoese & Allen, 2009 Fr native   4.50 cm SL male/unsexed    No picture yet.
Gobiidae Glossogobius nanus Hoese, Allen & Hadiaty, 2017 Fr native   4.30 cm SL male/unsexed  Known from the Fly River (Ref. 116998).  No picture yet.
Gobiidae Glossogobius pumilus Hoese, Allen & Hadiaty, 2017 Fr native   4.00 cm SL male/unsexed  Known from the Bensbach River (Ref. 116998).  No picture yet.
Gobiidae Glossogobius robertsi Hoese & Allen, 2009 Fr native   13.20 cm SL male/unsexed    No picture yet.
Gobiidae Glossogobius sentaniensis Hoese & Allen, 2015 Fr endemic   14.40 cm SL male/unsexed ;14.00 cm SL female    No picture yet.
Gobiidae Glossogobius torrentis Hoese & Allen, 1990 Fr endemic    Known from the Torricelli Mountains and the Jimmi River in the Sepik drainage and in mountain tributaries of the Ramu River (Ref. 2847). Also Ref. 6771, 13533.  No picture yet.
Melanotaeniidae Glossolepis kabia (Herre, 1935) Fr native   8.20 cm SL male/unsexed  Known from Sepik & Ramu Rivers (Ref. 87052).  No picture yet.
Melanotaeniidae Glossolepis maculosa Allen, 1981 Fr endemic  Spotted rainbowfish (English), Black-spotted rainbowfish (English)  5.00 cm SL male/unsexed  Known from Markham and Ramu river systems. Has been found at only a few localities, including the Omsis River and a small side branch of it near Lake Wanam, from small swamps and creeks near Brahman in the Ramu system, and from Maram Stream about 20 km north of Josephstaal, also in the Ramu and Sepik rivers (Ref. 13533). Also Ref. 6376 and 6993. 
Melanotaeniidae Glossolepis multisquamata (Weber & de Beaufort, 1922) Fr native  Rosy rainbowfish (English)  12.00 cm SL male/unsexed ;10.00 cm SL female  Found in floodplains of the Sepik and Ramu rivers. Also Ref. 6993, 13533. 
Melanotaeniidae Glossolepis ramuensis Allen, 1985 Fr endemic  Ramu rainbowfish (English)  6.50 cm SL male/unsexed  Mostly recorded from tributary streams of the Gogol River near Madang, but also known from the middle Ramu and Sepik rivers (Ref. 13533). Also Ref. 6376 and 6771. 
Melanotaeniidae Glossolepis wanamensis Allen & Kailola, 1979 Fr endemic  Lake Wanam rainbowfish (English) scarce (very unlikely) 9.00 cm SL male/unsexed  Known only from Lake Wanam, a roughly circular lake situated on a small plateau at an elevation of about 150 m, 24 km west of the Lae. Also Ref. 6376 and 6993. 
Carcharhinidae Glyphis glyphis (Müller & Henle, 1839) Fr, Br, M native  Speartooth shark (English)  100.00 cm TL male/unsexed ;175 cm TL female  Specimens collected from close to Port Romilly (07°40′S, 144°50′ E) and Fly River (07°19′ S, 141°11′ E) (Ref. 76952). Also Ref. 244. 
Gobiidae Gobiopterus semivestitus (Munro, 1949) Fr native   2.70 cm TL male/unsexed  Recorded from the Fly R. system. Also Ref. 13533.  No picture yet.
Gobiidae Gymnoamblyopus novaeguineae Murdy & Ferraris, 2003 Fr native   9.90 cm SL female  Type locality, Lower Fly River, WAM P.29823-001 (holotype of Gymnoamblyopus novaeguineae, 9.9 cm SL, female). The type locality is near Burei Junction approximately 200 km upstream from the Fly River mouth, where the water in this part of the river is tidally influenced but fresh (Ref. 45979). 
Muraenidae Gymnothorax polyuranodon (Bleeker, 1854) Fr, Br, M native  Freshwater moray (English)  150 cm TL male/unsexed  Also Ref. 1601and 6993. 
Ariidae Hemiarius dioctes (Kailola, 2000) Fr, Br, M native   120 cm SL male/unsexed  Recorded from the middle and lower river and delta of the Fly and throughout the Gulf of Papua rivers, including the Kikori, Era, Pie and Purari systems and deltas, Vailala River mouth, Murua River, Lakekamu and Oreke Rivers (Ref. 40908). Once considered a very important commercial species at Kikori, second only to Lates calcarifer (Ref. 40908).  No picture yet.
Gobiidae Hemigobius hoevenii (Bleeker, 1851) Fr native   6.00 cm TL male/unsexed  Recorded from the Binaturi river system (Ref. 6771). Museum: Tureture village, Binaturi, WAM P.26751-066 (2, 2.15-3.7 cm SL) (Ref. 43716). 
Terapontidae Hephaestus adamsoni (Trewavas, 1940) Fr, Fi endemic  Adamson's grunter (English) common (usually seen) 40.00 cm SL male/unsexed  Restricted to Lake Kutubu in the Southern Highlands Province. Also Ref. 6192.  No picture yet.
Terapontidae Hephaestus fuliginosus (Macleay, 1883) Fr questionable  Sooty grunter (English)  54.00 cm FL male/unsexed  Reported from Purari and upper Fly River systems (Ref. 2847, 13533). In the Fly system, it was collected from the main river at Kiunga and from the Ok Mart River near Rumginae at distances about 850-900 km upstream from the sea (Ref. 9847). Also Ref. 6192. 
Terapontidae Hephaestus habbemai (Weber, 1910) Fr native   15.00 cm SL male/unsexed  Known from Fly-Strickland river system. In the Fly River it is common around Tabubil, approximately 970-980 km upstream from the sea. Also Ref. 6192, 13533.  No picture yet.
Terapontidae Hephaestus komaensis Allen & Jebb, 1993 Fr native   14.25 cm SL male/unsexed  Museum: Koma River, small tributary ca 400 m from the main river, WAM P.30348-004 (holotype, 14.25 cm SL) (Ref. 26590).  No picture yet.
Terapontidae Hephaestus obtusifrons (Mees & Kailola, 1977) Fr native  Striped grunter (English)  12.50 cm SL male/unsexed  Known from the Bewani Mountains in the headwaters of the Pual (or Nemayer) River system. Also Ref. 6192.  No picture yet.
Terapontidae Hephaestus raymondi (Mees & Kailola, 1977) Fr endemic  Ray Moore's grunter (English)  25.00 cm SL male/unsexed  Known only from the Morehead River (Ref. 2847). Recorded from the Bensbach river (Ref. 50786). Also Ref. 6192.  No picture yet.
Terapontidae Hephaestus roemeri (Weber, 1910) Fr questionable  Romer's grunter (English)  30.00 cm SL male/unsexed  Recorded from Binge R.  No picture yet.
Terapontidae Hephaestus transmontanus (Mees & Kailola, 1977) Fr endemic  Northern grunter (English)  12.50 cm SL male/unsexed  Known from Ramu and Sepik River systems. Also found in the Ramu main stream in the upper Ramu Valley upstream of the Brahman Mission Bridge. Occurs in most creeks in the Torricelli Mountain range and its foothills on the northern side of the Sepik watershed and on the southern side in the Jimmi River and some of its tributaries, including the Baiyer River. Also Ref. 6192, 13533.  No picture yet.
Terapontidae Hephaestus trimaculatus (Macleay, 1883) Fr endemic  Threespot grunter (English)  22.00 cm SL male/unsexed  Known only from the vicinity of Port Moresby in the Laloki River and its tributaries including the Brown and Goldie rivers. Also Ref. 6192.  No picture yet.
Dorosomatidae Herklotsichthys castelnaui (Ogilby, 1897) Fr, Br, M native   20.00 cm SL male/unsexed  Found near the mouth of the Fly River. Also Ref. 13533 
Syngnathidae Hippichthys heptagonus Bleeker, 1849 Fr, Br native  Reticulated freshwater pipefish (English)  15.00 cm SL male/unsexed  Also Ref. 5316 and 6993. 
Syngnathidae Hippichthys penicillus (Cantor, 1849) Fr, Br, M native  Steep-nosed pipefish (English)  18.00 cm SL male/unsexed  Recorded from Meiro R., Madang (Ref. 6993). Also Ref. 5316. 
Eleotridae Hypseleotris compressa (Krefft, 1864) Fr native  Australian carp-gudgeon (English)  12.00 cm SL male/unsexed  Mostly recorded from the Fly River Delta region including the Bensbach River. Also Ref. 6771, 13533. 
Eleotridae Hypseleotris cyprinoides (Valenciennes, 1837) Fr native  Tropical carp-gudgeon (English)  8.00 cm SL male/unsexed   
Eleotridae Hypseleotris guentheri (Bleeker, 1875) Fr, Br, M native   7.50 cm SL male/unsexed  Known from Madang, Manus Island, Wewak and New Ireland; also from Sepik-Ramu river (Ref. 13533).  No picture yet.
Melanotaeniidae Iriatherina werneri Meinken, 1974 Fr native   4.00 cm SL male/unsexed ;3.00 cm SL female  Known from Fly, Bensbach, Morehead and Pahoturi rivers. Also Ref. 6993, 13533, 75154. 
Sciaenidae Johnius australis (Günther, 1880) Fr, Br, M native   23.00 cm SL male/unsexed  Also Ref. 75154.  No picture yet.
Pseudomugilidae Kiunga ballochi Allen, 1983 Fr endemic  Glass blue-eye (English), Balloch's rainbowfish (English)  3.00 cm SL male/unsexed  Known only from a few small creeks along a 15-20 km stretch of the Ok Tedi Mine supply road between Kiunga and Tabubil in the Upper Fly River. Also Ref. 6376, 6993, 13533  No picture yet.
Pseudomugilidae Kiunga bleheri Allen, 2004 Fr native      No picture yet.
Kuhliidae Kuhlia marginata (Cuvier, 1829) Fr native  Spotted flagtail (English)  17.90 cm SL male/unsexed  Known from Sepik-Ramu river (Ref. 13533). Also Ref. 2847. 
Kuhliidae Kuhlia rupestris (Lacepède, 1802) Fr, Br, M native  Rock flagtail (English)  45.00 cm TL male/unsexed  Recorded from Port Moresby and Madang (Ref. 2847); known from Sepik- Ramu river (Ref. 13533). Also Ref. 6192. 
Kurtidae Kurtus gulliveri Castelnau, 1878 Fr, Br native  Nurseryfish (English)  63.00 cm TL male/unsexed  Mostly recorded from the Fly Delta region. Occurs as far upsteam as 830 km from the mouth of the Fly River (Ref. 2847). Also Ref. 6771, 13533. 
Ophichthidae Lamnostoma kampeni (Weber & de Beaufort, 1916) Fr native   41.00 cm TL male/unsexed  Found in small tributaries of the Gogol River, near Madang. Specimens were collected from a clear, flowing rainforest stream about 45 km upstream from the sea and at an elevation of about 35 m. Also Ref. 6993. 
Ophichthidae Lamnostoma mindora (Jordan & Richardson, 1908) Fr native   40.00 cm TL male/unsexed   
Latidae Lates calcarifer (Bloch, 1790) Fr, Br, M native  Barramundi (English) common (usually seen) 200 cm TL male/unsexed  Very common in the Middle Fly, including Lake Murray and occurs at least as far upstream as Kiunga, more than 800 km from the mouth. Also Ref. 3281, 6192, 780, 13533. 
Leiognathidae Leiognathus equula (Forsskål, 1775) Fr, Br, M, Fi native  Common ponyfish (English)  28.00 cm TL male/unsexed  Known from Sepik-Ramu river (Ref. 13533). Also Ref. 2847. 
Gobiidae Lentipes multiradiatus Allen, 2001 Fr native   3.75 cm SL male/unsexed  Known from Awaetowa River, D’Entrecasteaux Islands, Fergusson Island; Dibuwa River, D’Entrecasteaux Islands, Normanby Island (Ref. 97410). 
Gobiidae Lentipes venustus Allen, 2004 Fr native   3.98 cm SL male/unsexed  Found only in the D'Entrecasteaux Islands in Milne Bay Province where it is recorded from Tuabeda River in Goodebough Island, upper Awaetowa River in Fergusson Island, and upper Aawaetowa and Dibuwa rivers in Normanby Island (Ref. 77028). 
Gobiidae Lentipes watsoni Allen, 1997 Fr native   6.44 cm SL male/unsexed  Recorded from Sapoi river.  No picture yet.
Soleidae Leptachirus bensbach Randall, 2007 Fr native   10.70 cm SL male/unsexed  Type locality, Bensbach River, 12 km downstream of Balamuk, WAM P.27820-003 (holotype of Leptachirus bensbach, 6.94 cm SL, female) (Ref. 84817). 
Soleidae Leptachirus kikori Randall, 2007 Fr, Br native   7.16 cm SL male/unsexed  Type locality, Kikori River, 4 km southwest of Ero village, WAM P.31210-002 (holotype of Leptachirus kikori, 7.16 cm SL, male). Collected from slightly brackish water at two collection sites of the Kikori River (Ref. 84817). 
Soleidae Leptachirus klunzingeri (Weber, 1907) Fr misidentification    Specimens reported from the Fly (as far as about 300-350 km upstream from the mouth), Bensbach rivers (Ref. 2847), and probably those in Ref. 6771, 13533, may refer to a different species of Leptachirus (Ref. 84817). 
Soleidae Leptachirus robertsi Randall, 2007 Fr native   7.14 cm SL male/unsexed  Type locality, Western Province, tidal creek on right side of Lower Fly River, 1 km upriver from D'Albertis Island, USNM 217314 (holotype of Leptachirus robertsi, 6.5 cm SL, female). Presently known only from the Lower Fly River of Papua New Guinea and the Burei River, a tributary of the Lower Fly River; collected from small turbid creeks. Misidentified as Aseraggodes klunzingeri in Roberts, 1978:69 in the Fly River (Ref. 84817). 
Leptobramidae Leptobrama muelleri Steindachner, 1878 Fr, Br, M misidentification  Beach salmon (English)  37.50 cm SL male/unsexed  Misidentification of Leptobrama pectoralis (Ref. 129587). 
Syngnathidae Lophocampus brevidorsalis (de Beaufort, 1913) Fr native   11.50 cm SL male/unsexed  Known from the eastern tip of Papua New Guinea and Manus Island. Also from Maiwara, Madang (Ref. 6993).  No picture yet.
Syngnathidae Lophocampus retzii (Bleeker, 1856) Fr native  Ragged-tail pipefish (English)  14.50 cm SL male/unsexed  Also Ref. 5316 and 6993. 
Lutjanidae Lutjanus argentimaculatus (Forsskål, 1775) Fr, Br, M, Fi native  Mangrove jack (English)  150 cm TL male/unsexed  Adults occur on coastal reefs and deeper offshore areas, but juveniles and subadults favor estuaries and the lower sections of freshwater streams. The young are often found in mangrove areas (Ref. 2847); known from Kimbe bay (Ref. 28888); and from Fly river (Ref. 13533). Also Ref. 55 and 6192. 
Lutjanidae Lutjanus fuscescens (Valenciennes, 1830) Fr, Br, Sp native  Dusky snapper (English) common (usually seen) 40.00 cm TL male/unsexed  Collected mostly from New Britain. Much sought after by Australian anglers in rivers in the vicinity of the Palasea Peninsula on the north coast. Also Ref. 55 and 6192. 
Lutjanidae Lutjanus goldiei (Macleay, 1882) Fr, Br endemic  Papuan black bass (English)  100.00 cm TL male/unsexed  Type locality (Ref. 48635). Most specimens are taken from streams draining into the Gulf of Papua, but it also occurs in the Sepik and Ramu rivers in the north. In the Fly River, it has been collected as far upstream as 828 km from the sea, but is most common in the Middle Fly (about 200-400 km upstream). Found in narrow 'blackwater' rainforest tributaries in the lower Ramu system, and in the Sepik mainstream at Angoram. Also Ref. 55, 6192, 13533. 
Lutjanidae Lutjanus maxweberi Popta, 1921 Fr, Br native  Pygmy snapper (English)  15.00 cm SL male/unsexed  Found near Wewak and Lae. Also Ref. 55, 469, 6192, 48635. 
Tetraodontidae Marilyna pleurosticta (Günther, 1872) Fr, Br, M native    Found near the mouth of the Fly River. Also Ref. 13533.  No picture yet.
Megalopidae Megalops cyprinoides (Broussonet, 1782) Fr, Br, M, Fi native  Ox-eye herring (English), Bunpis (Creole, English), U-u-la (Motu)  150 cm TL male/unsexed  Recorded as far as 900 km upstream in the Fly River. Also known from the Sepik River (Ref. 7017) and Bensbach river (Ref. 50786). Also Ref. 6993, 13533. 
Blenniidae Meiacanthus anema (Bleeker, 1852) Fr, Br, M native  Threadless blenny (English)  7.20 cm SL male/unsexed  Also Ref. 90102. Recorded from Meiro R., Madang, Umboi Is. (Ref. 6192), Kiriwina Is. and the Maiwara R. mouth of west of Alotau (Ref. 6771). Occurs in estuarine and freshwater habitats, frequently where mangroves are abundant; in coastal creeks, it is usually found within 2-3 km of the sea (Ref. 2847). 
Melanotaeniidae Melanotaenia affinis (Weber, 1907) Fr native  Red-finned rainbowfish (English)  11.50 cm SL male/unsexed ;10.00 cm SL female  Common in the tributary streams of the Markham, Ramu and Sepik rivers. Found in some mountainous headwater streams of the Sepik in the Western Highlands, such as in the Baiyer River Valley. Also Ref. 6993, 13533. 
Melanotaeniidae Melanotaenia caerulea Allen, 1996 Fr native  Blue rainbowfish (English)  6.15 cm SL male/unsexed  Collected at several sites in the lower and middle Kikori drainage system, ranging a distance of about 125 km, between elevations of about 20 and 400 m above mean sea level. The species was not collected in the mainstream, but rather in small tributary creeks, flowing through the rainforest, except one which was taken from a small tidal creek-fed pond in open sunlight. Museum: tributary of Mubi River near Wasi Falls Lodge, Stn. 7, WAM P.30986-001 (holotype, 6.15 cm SL) (Ref. 26387).  No picture yet.
Melanotaeniidae Melanotaenia goldiei (Macleay, 1883) Fr native  Gold-line rainbowfish (English)  11.50 cm SL male/unsexed ;10.00 cm SL female  Known from Fly river (Ref. 13533). Also Ref. 6993. 
Melanotaeniidae Melanotaenia herbertaxelrodi Allen, 1981 Fr endemic  Lake Tebera rainbowfish (English)  9.00 cm SL male/unsexed  Known mainly from the Lake Tebera basin in the Southern Highlands. A single specimen has been recorded from Karamui, about 38 km north of the lake. Also Ref. 6993. 
Melanotaeniidae Melanotaenia iris Allen, 1987 Fr endemic  Strickland rainbowfish (English)  10.00 cm SL male/unsexed  Known only from 5 specimens collected in 1984 from the Logatyu River, a mountain tributary of the Strickland River near Wankipe. Also known from Fly river (Ref. 13533). Also Ref. 6376, 6771, 34593.  No picture yet.
Melanotaeniidae Melanotaenia lacustris Munro, 1964 Fr, Fi, Sp endemic  Lake Kutubu rainbowfish (English)  10.00 cm SL male/unsexed  Known only from Lake Katubu and its outlet, the Soro River, in the Kikori River drainage of the Southern Highlands. Utilized as an aquarium fish (Ref. 6398). Also Ref. 6993. 
Melanotaeniidae Melanotaenia maccullochi Ogilby, 1915 Fr misidentification  McCulloch's rainbowfish (English)  7.00 cm SL male/unsexed  Outside distributional range (Ref. 121823). Reported Known from the lower and middle sections of the Fly River westward to the Bensbach River (Ref. 2847). Also Ref. 6993, 13533, 50786, 75154. 
Melanotaeniidae Melanotaenia monticola Allen, 1980 Fr endemic  Mountain rainbowfish (English)  8.00 cm SL male/unsexed  Known from a relatively small area of the Southern Highands between Mendi and Lake Kutubu. Collected from small headwater tributaries in the Purari River system, including Omei Creek, 15 km south of Mendi and streams near Pimaga (about 13 km southeast of Lake Kutubu). Utilized as an aquarium fish (Ref. 6398). Also Ref. 6993.  No picture yet.
Melanotaeniidae Melanotaenia mubiensis Allen, 1996 Fr native  Mubi rainbowfish (English)  9.26 cm SL male/unsexed  Specimens collected from the middle of the Kikori drainage system, covering about 20 km, between elevations of about 380 and 400 m above mean sea level. All collecting sites were tributaries of the Mubi R. and the outlet for Lake Kutubu. Museum: side channel of Mubi R., Stn. 5, WAM P.30984-001 (holotype, 9.26 cm SL) (Ref. 26387).  No picture yet.
Melanotaeniidae Melanotaenia oktediensis Allen & Cross, 1980 Fr endemic  Oktedi rainbowfish (English)  10.00 cm SL male/unsexed  Known only from the Ok Tedi River and its tributaries, in the Upper Fly River system. Mostly collected from creeks near Tabubil approximately 900-950 km upstream from the sea in mountainous terrain from 300-500 m elevation. Utilized as an aquarium fish (Ref. 6398). Also Ref. 6993, 13533.  No picture yet.
Melanotaeniidae Melanotaenia papuae Allen, 1981 Fr, Fi endemic  Papua rainbowfish (English)  6.50 cm SL male/unsexed ;6.00 cm SL female  Found in the vicinity of Port Moresby. Collected from numerous streams within a 35 km radius of Port Moresby. Utilized as an aquarium fish (Ref. 6398). Also Ref. 6993.  No picture yet.
Melanotaeniidae Melanotaenia parkinsoni Allen, 1980 Fr endemic  Parkinson's rainbowfish (English)  11.00 cm SL male/unsexed ;9.00 cm SL female  Widespread along the southern coast of eastern Papua New Guinea between the Kemp Welsh River and Milne Bay, but has been found only at a few widely scattered sites within this area. Also Ref. 6993. 
Melanotaeniidae Melanotaenia pimaensis Allen, 1981 Fr endemic   10.00 cm SL male/unsexed  Known only from the Pima River at the junction with the Tua River in the Southern Highlands. Also Ref. 6993.  No picture yet.
Melanotaeniidae Melanotaenia rubrostriata (Ramsay & Ogilby, 1886) Fr native  Red-striped rainbowfish (English)  12.50 cm SL male/unsexed ;10.00 cm SL female  Recorded from the Aramia River (near Fly River) and Daru Island (Ref. 2847) and Fly river (Ref. 13533). Also Ref. 6993. 
Melanotaeniidae Melanotaenia sahulensis Hammer, Allen, Martin, Adams & Unmack, 2019 Fr native   4.84 cm SL male/unsexed ;3.87 cm SL female  Known from the Pahoturi to Bensbach river systems including the mid-Fly (Ref. 121823).  No picture yet.
Melanotaeniidae Melanotaenia sexlineata (Munro, 1964) Fr endemic  Fly River rainbowfish (English), Six-lined rainbowfish (English)  7.30 cm SL male/unsexed  Known only from a few sites in the upper Fly River system near Kiunga. Also Ref. 6376, 6993, 13533. 
Melanotaeniidae Melanotaenia sylvatica Allen, 1997 Fr native   5.50 cm SL male/unsexed    No picture yet.
Terapontidae Mesopristes argenteus (Cuvier, 1829) Fr, Br, M, Fi native  Silver grunter (English)  30.00 cm SL male/unsexed  Known from New Britain (Ref. 2847); Kimbe bay (Ref. 28888) and from Sepik-Ramu river (Ref. 13533). Also Ref. 6192, 7050, 13533. 
Terapontidae Mesopristes cancellatus (Cuvier, 1829) Fr, Br, M native  Tapiroid grunter (English)  23.00 cm SL male/unsexed  Known from New Britain. Also Ref. 6192 and 7050. 
Terapontidae Mesopristes iravi Yoshino, Yoshigou & Senou, 2002 Fr, Br native   22.31 cm SL male/unsexed  Reported as juveniles of M. argenteus (Ref. 44255).  No picture yet.
Syngnathidae Microphis brachyurus (Bleeker, 1854) Fr, Br, M native  Short-tailed pipefish (English)  22.00 cm SL male/unsexed  Known from Sepik - Ramu river system (Ref. 13533). Also Ref. 5316 and 6993. 
Syngnathidae Microphis leiaspis (Bleeker, 1854) Fr, Br native   19.00 cm SL male/unsexed  Recorded from the Vailala creek and in the heardwaters of the Fly R. (Ref. 6993). Also Ref. 5316. 
Syngnathidae Microphis manadensis (Bleeker, 1856) Fr, Br native  Menado pipefish (English)  20.00 cm SL male/unsexed  Also Ref. 5316, 6993, 7050, 78751. 
Syngnathidae Microphis mento (Bleeker, 1856) Fr native   15.00 cm SL male/unsexed  Recorded in 1987 from a small creek near Bogia on the north coast of Papua New Guinea.  No picture yet.
Syngnathidae Microphis millepunctatus (Kaup, 1856) Fr, Br, M native   22.00 cm TL male/unsexed   
Syngnathidae Microphis spinachioides (Duncker, 1915) Fr native  Spinach pipefish (English)  15.00 cm SL male/unsexed  Most specimens were recorded from Sepik River at distances from 35-100 km upstream from the sea. Most recent collection was in 1986 in the May River, a tributary of the middle Sepik about 570 km upstream. Also known from Ramu river (Ref. 13533). Also Ref. 6993 and 12255.  No picture yet.
Eleotridae Mogurnda aurifodinae Whitley, 1938 Fr native   10.00 cm SL male/unsexed  Known from Markham, Gogol, Ramu and Sepik rivers. Also Ref. 6771, 13533.  No picture yet.
Eleotridae Mogurnda cingulata Allen & Hoese, 1991 Fr native   13.00 cm SL male/unsexed  Known from the Fly-Strickland river system. Also Ref. 13533. 
Eleotridae Mogurnda furva Allen & Hoese, 1986 Fr endemic  Black mogurnda (English) scarce (very unlikely) 12.00 cm SL male/unsexed  Known only from Lake Kutubu. Also Ref. 6771.  No picture yet.
Eleotridae Mogurnda kutubuensis Allen & Hoese, 1986 Fr endemic  abundant (always seen in some numbers) 9.50 cm SL male/unsexed  Found only in Lake Kutubu and surrounding areas. Has been collected from the Soro River (oulet of Lake Kutubu and headwater stream of the Kikori River) and the Sura River and its tributaries between Lake Kutubu and Pimaga. Also Ref. 6771.  No picture yet.
Eleotridae Mogurnda lineata Allen & Hoese, 1991 Fr endemic  Kokoda mogurnda (English)  8.50 cm SL male/unsexed  Known only from Kali, Ejava and Oivi creeks, about 12-15 km east of Kokoda.  No picture yet.
Eleotridae Mogurnda maccuneae Jenkins, Buston & Allen, 2000 Fr endemic  Iriguabi (Foi)  7.38 cm SL male/unsexed  Type locality, Lake Kutubu, mouth of Soro river. Not commonly seen at the other locations around the lake. Most commonly seen around the mouth of the Soro river over beds of the matted algae Nitella pseudoflabellata and the eel-grass Valisneria natans. Often seen sharing the same habitat with M. kutubuensis, M. vitta, M. variegata and M. spilota (Ref. 36923).  No picture yet.
Eleotridae Mogurnda malsmithi Allen & Jebb, 1993 Fr native   6.77 cm SL male/unsexed    No picture yet.
Eleotridae Mogurnda mogurnda (Richardson, 1844) Fr native  Purple-spotted gudgeon (English)  20.00 cm TL male/unsexed  Known only from the Fly River delta. Also Ref. 6771, 13533. 
Eleotridae Mogurnda mosa Jenkins, Buston & Allen, 2000 Fr endemic  Mosa (Foi)  11.72 cm SL male/unsexed  It is relatively common in the type locality, Lake Kutubu, southern end of Lake near Gesege Village. It can be seen in the mud with only the snout, eyes and a small portion of the dorsal surface protruding. This species is not commonly seen at other locations around the lake.  No picture yet.
Eleotridae Mogurnda orientalis Allen & Hoese, 1991 Fr endemic  Eastern mogurnda (English)  11.00 cm SL male/unsexed  Known only from streams in the vicinity of Safia on the north-eastern side of the Owen Stanley Range.  No picture yet.
Eleotridae Mogurnda pulchra Horsthemke & Staeck, 1990 Fr endemic   8.00 cm SL male/unsexed  Known from the Laloki River system near Port Moresby and the Purari Delta area. Probably widespread in eastern Papua New Guinea, south of the Owen Stanley Range. Found in lowland streams and swamps and also on the Sogeri Plateau (elevation about 500 m) near Port Moresby. Also Ref. 6771.  No picture yet.
Eleotridae Mogurnda spilota Allen & Hoese, 1986 Fr endemic  Blotched mogurnda (English) occasional (usually not seen) 13.00 cm SL male/unsexed  Known only from Lake Kutubu. Also Ref. 6771.  No picture yet.
Eleotridae Mogurnda variegata Nichols, 1951 Fr endemic  Variegated mogurnda (English), Variegated gudgeon (English) common (usually seen) 13.00 cm SL male/unsexed  Known only from Lake Kutubu. Also Ref. 6771.  No picture yet.
Eleotridae Mogurnda vitta Allen & Hoese, 1986 Fr endemic  Striped mogurnda (English) scarce (very unlikely) 12.50 cm SL male/unsexed  Known only from Lake Kutubu. Also Ref. 6771.  No picture yet.
Monodactylidae Monodactylus argenteus (Linnaeus, 1758) Fr, Br, M, Fi native  Silver moonfish (English)  27.00 cm SL male/unsexed  Commonly found in mangrove estuaries, often entering creeks (Ref. 6192); and from Kimbe bay (Ref. 28888). 
Mugilidae Mugil cephalus Linnaeus, 1758 Fr, Br, M native  Sea mullet (English), Waloya (Misima-Paneati)  100.00 cm SL male/unsexed  Known from Kimbe bay (Ref. 28888). 
Gobiidae Mugilogobius filifer Larson, 2001 Fr, Br native   3.90 cm SL male/unsexed  Collected from a brackish lagoon cut off from the ocen by sand-spit, PukPuk I., opposite Kieta, Bougainville I. (Ref. 43716).  No picture yet.
Gobiidae Mugilogobius fusculus (Nichols, 1951) Fr, Br native  One-thread goby (English)  3.50 cm SL male/unsexed  Has been recently recorded from the Lower Sepik near Angoram (Ref. 2847) and Ramu river (Ref. 13533). Also Ref. 6771, 26752.  No picture yet.
Gobiidae Mugilogobius mertoni (Weber, 1911) Fr native   6.00 cm SL male/unsexed   
Gobiidae Mugilogobius notospilus (Günther, 1877) Fr, Br native   3.00 cm SL male/unsexed  Known from Manus Is. (Ref. 6771).  No picture yet.
Gobiidae Mugilogobius rambaiae (Smith, 1945) Fr, Br native   4.15 cm SL male/unsexed   
Ariidae Nedystoma dayi (Ramsay & Ogilby, 1886) Fr native  Day's catfish (English)  20.00 cm SL male/unsexed  Known from the Purari and Fly rivers. Also Ref. 6993, 13533.  No picture yet.
Ariidae Nedystoma novaeguineae (Weber, 1913) Fr native  Spoon-snouted catfish (English)  15.00 cm SL male/unsexed  Known from the Lower Purari River and vicinity of Balimo (Aramia River). Also Ref. 6993. 
Ariidae Nemapteryx augusta (Roberts, 1978) Fr endemic  Short-barbelled catfish (English)  60.00 cm SL male/unsexed  Known only from the Fly River. Relatively common in large tributaries of the Middle Fly, but also ranges as far as 830 km upstream from the sea into the upper Fly. Also Ref. 6993, 13533.  No picture yet.
Dorosomatidae Nematalosa erebi (Günther, 1868) Fr, Br native  Australian river gizzard shad (English)  48.00 cm SL male/unsexed  Also Ref. 188, 5259, 75154, 78751. 
Dorosomatidae Nematalosa flyensis Wongratana, 1983 Fr endemic  Fly river gizzard shad (English)  22.20 cm SL male/unsexed  Known only from the Fly-Strickland River system. Also Ref. 188, 6993, 13533. 
Dorosomatidae Nematalosa papuensis (Munro, 1964) Fr endemic  Strickland River herring (English)  21.00 cm SL male/unsexed  Known only from the Fly-Strickland River system. Has been collected at distances between 264 and 856 km upstream from the sea. Also Ref. 188, 6993, 13533. 
Ariidae Neoarius berneyi (Whitley, 1941) Fr native  Berney's catfish (English)  45.00 cm SL male/unsexed  Common in lakes, lagoons and large rivers of the Middle Fly River system. Also found in lowland habitats of the Upper Fly River as far as 850 km upstream from the sea. Also Ref. 6993, 13533. 
Ariidae Neoarius coatesi (Kailola, 1990) Fr, Fi endemic  occasional (usually not seen) 75.00 cm SL male/unsexed 37 SL Known only from the lower and middle Sepik and Ramu river systems. Also Ref. 6771, 9233, 13533.  No picture yet.
Ariidae Neoarius graeffei (Kner & Steindachner, 1867) Fr, Br, M native  Salmon catfish (English)  60.00 cm SL male/unsexed  Known from the Purari (Ref. 2847) and Fly Rivers (Ref. 13533). Also Ref. 6993, 78751. 
Ariidae Neoarius latirostris (Macleay, 1883) Fr native  Broad-snouted catfish (English)  50.00 cm SL male/unsexed  Known from Laloki, Purari and Fly rivers. In the Fly River, this is the only ariid known from highland habitats and is also common in lowland waters. Has been collected as far as 940 km upstream from the sea at an elevation of about 450 m. Also Ref. 6993, 13533.  No picture yet.
Ariidae Neoarius leptaspis (Bleeker, 1862) Fr native  Triangular-shield catfish (English)  60.00 cm SL male/unsexed  Occurs in the Purari River and commonly found in lakes, lagoon and tributaries of the Middle Fly River. Also Ref. 6993, 13533. 
Ariidae Neoarius taylori (Roberts, 1978) Fr native  Taylor's catfish (English)  40.00 cm SL male/unsexed  Known only from the Upper Fly River system, about 930 km upstream from the sea. The type specimens were collected at about 3 m depth from a moderately flowing, turbid section of the Palmer River (tributary of the Upper Fly). Also Ref. 6376, 6993, 13533.  No picture yet.
Ariidae Neoarius utarus (Kailola, 1990) Fr, Fi native  common (usually seen) 55.00 cm SL male/unsexed 26.5 SL Known from the lower and middle Ramu and Sepik river systems. Also Ref. 9233, 13533. 
Ariidae Neoarius velutinus (Weber, 1907) Fr, Fi native  Papillate catfish (English) occasional (usually not seen) 60.00 cm SL male/unsexed 28 SL Strictly confined to the turbid river channels of Ramu and Sepik river systems. Also Ref. 6993, 9233, 13533.  No picture yet.
Plotosidae Neosilurus ater (Perugia, 1894) Fr native  Narrow-fronted tandan (English)  47.00 cm TL male/unsexed  Known from the Fly Delta region (Balimo to Bensbach River) and Inawi (about 75 km northwest of Port Moresby). Also Ref. 6993, 13533, 75154. 
Plotosidae Neosilurus brevidorsalis (Günther, 1867) Fr, Sp native  Short-finned tandan (English)  20.00 cm SL male/unsexed 12 SL Known from the Kemp Welsh River (about 100 km east of Port Moresby) and Fly system. Generally found in lowland areas, but also occurs in upland habitats such as the Sogeri Plateau near Port Moresby. In the Fly system, it penetrates well inland at least to about 930 km upstream from the mouth. Also Ref. 6993, 13533. 
Plotosidae Neosilurus coatesi (Allen, 1985) Fr native    Known from Sepik River basin in streams of Torracelli Mountains (Ref. 58032).  No picture yet.
Plotosidae Neosilurus equinus (Weber, 1913) Fr native  Gjellerup's tandan (English)  37.50 cm TL male/unsexed  Known from the Upper Kikori (including Lake Kutubu) and Fly-Strickland river systems (at least as far as 970 km upstream from the sea). Also Ref. 6993, 13533.  No picture yet.
Plotosidae Neosilurus gjellerupi (Weber, 1913) Fr native  Coates' tandan (English)  30.00 cm TL male/unsexed  Found in the Ramu River basin (Ref. 58032). Also Ref. 13533.  No picture yet.
Plotosidae Neosilurus idenburgi (Nichols, 1940) Fr native  Idenburg River tandan (English)  27.00 cm SL male/unsexed  Known from Markham, Ramu, Sepik and Pual river systems. Also Ref. 6993, 13533.  No picture yet.
Plotosidae Neosilurus novaeguineae (Weber, 1907) Fr native   21.00 cm SL male/unsexed 11.5 SL Known from the Ramu and Sepik river systems. Also Ref. 13533.  No picture yet.
Sciaenidae Nibea soldado (Lacepède, 1802) Fr, Br, M native  Silver jewfish (English)  60.00 cm SL male/unsexed  Inhabits coastal waters. Juveniles usually occur in brackish estuaries and often ascend the lower reaches of large, turbid rivers. Known from Sepik-Ramu river (Ref. 13533). Also Ref. 6192 and 9772. 
Sciaenidae Nibea squamosa Sasaki, 1992 Fr, Br, M native   65.00 cm SL male/unsexed  Also Ref. 75154. 
Gobiidae Oligolepis acutipennis (Valenciennes, 1837) Fr, Br native   15.00 cm TL male/unsexed  Known from the Oriomo River and a stream near Rabaul, New Britain (Ref. 2847). Also Ref. 6771. 
Gobiidae Oligolepis stomias (Smith, 1941) Fr native    Recorded from Murnass R., Madang. 
Plotosidae Oloplotosus luteus Gomon & Roberts, 1978 Fr endemic  Pale yellow tandan (English)  15.00 cm TL male/unsexed  Known only from the Fly-Strickland river system. Most specimens have been found from moderate to fast-flowing, gravel-boulder bottom creeks in mountainous tributaries of the Ok Tedi River at distances between about 930 and 1000 km upstream from the sea. A single fish was also collected from the Nomad River (tribuatry of the Strickland River) in foothill terrain about 800 km upstream. Also Ref. 6993, 13533.  No picture yet.
Plotosidae Oloplotosus mariae Weber, 1913 Fr native   15.00 cm TL male/unsexed  Known from the Nomad River, an upper tributary of the Fly-Strickland system. Also Ref. 6993.  No picture yet.
Plotosidae Oloplotosus torobo Allen, 1985 Fr endemic  Kutubu tandan (English), Lake Kutubu tandan (English)  20.00 cm TL male/unsexed  Known only from the Lake Kutubu in the Southern Highlands Province. Also Ref. 6376 and 6993.  No picture yet.
Blenniidae Omobranchus ferox (Herre, 1927) Fr native  Gossamer blenny (English)  6.00 cm SL male/unsexed  Recorded from Cape Ward Hunt. 
Salmonidae Oncorhynchus mykiss (Walbaum, 1792) Fr, Aq introduced  Rainbow trout (English)  122 cm TL male/unsexed  Established in the upper Strickland system but is not utilized for food by local people (Ref. 2847).A government trout hatchery program is presently operating at Kegasugl, Simbu Province at the beginning of the walk-track to Mt. Wilhelm (Ref. 2847). Also Ref. 1739. 
Butidae Ophiocara porocephala (Valenciennes, 1837) Fr, Br, M native  Spangled gudgeon (English)  34.00 cm TL male/unsexed  Known from Fly and Sepik-Ramu rivers (Ref. 13533). Also Ref. 2847. 
Synbranchidae Ophisternon bengalense McClelland, 1844 Fr, Br, M native  One-gilled eel (English)  100.00 cm TL male/unsexed  Known from the Lower Sepik River (Angoram) and Lake Iaraguma (about 75 km northwest of Port Moresby) (Ref. 2847), also known from Ramu river (Ref. 13533). Also Ref. 6993 and 7050. 
Synbranchidae Ophisternon gutturale (Richardson, 1845) Fr native   60.00 cm TL male/unsexed  Known on the basis of a single specimen collected from the Bensbach River. Also ref. 6993.  No picture yet.
Cichlidae Oreochromis mossambicus (Peters, 1852) Fr, Br, Fi, Aq introduced  Tilapia (English) abundant (always seen in some numbers) 39.00 cm SL male/unsexed  Well established in freshwater habitats (Ref. 5198). Occurs throughout Madang Province (Ref. 26752). Known from the Laloki River system (Ref. 47015). Abundant in the lower Ramu and middle and lower Sepik rivers. Has become the most important food fish in the Sepik region. Also Ref. 2, 1739, 50786. 
Osphronemidae Osphronemus goramy Lacepède, 1801 Fr introduced  Giant gouramy (English)  70.00 cm SL male/unsexed   
Oxudercidae Oxuderces wirzi (Koumans, 1937) Fr, Br native  Wirz's goby (English)  10.50 cm SL male/unsexed  Recorded from Turama R. Recorded from southern Papua New Guinea (Ref. 92840). 
Butidae Oxyeleotris aruensis (Weber, 1911) Fr native  Aru Island gudgeon (English)  16.00 cm SL male/unsexed  Known from the Fly River near Kiunga and Bensbach River. Also Ref. 6771, 13533.  No picture yet.
Butidae Oxyeleotris caeca Allen, 1996 Fr endemic  Ihaaribi (Not specified)  10.70 cm SL female  Inhabits limestone caves and sinkholes in the hilly terrain of the Upper Kikori River System of Papua New Guinea. Museum: creek near Kafa, a tributary of the Mubi River, Upper Kikori R., WAM P.31011-001 (holotype, 10.7 cm SL, female) (Ref. 26384).  No picture yet.
Butidae Oxyeleotris fimbriata (Weber, 1907) Fr native  Rough-scaled loter (English)  18.00 cm SL male/unsexed  Known from Ramu, Sepik, Pual, Purari, Kikori (including Lake Kutubu) and Fly-Strickland river systems. Very common in the weedy shallows of Lake Kutubu. Also Ref. 6771, 13533.  No picture yet.
Butidae Oxyeleotris herwerdenii (Weber, 1910) Fr native  Black-banded gauvina (English)  30.00 cm SL male/unsexed  Known from Purari, Fly and Bensbach rivers; probably more widespread. Also Ref. 6771, 13533.  No picture yet.
Butidae Oxyeleotris heterodon (Weber, 1907) Fr native  Bigmaus (Creole, English)  41.00 cm SL male/unsexed ;39.60 cm SL female  Known from Sepik and Ramu river systems. Widespread throughout the floodplain of the Lower and Middle Sepik (Ref. 2847). Also Ref. 6771, 13533.  No picture yet.
Butidae Oxyeleotris lineolata (Steindachner, 1867) Fr native  Black-banded loter (English)  45.00 cm SL male/unsexed  Occurrence needs confirmation due to the absence of precise locality records (Ref. 2847). 
Butidae Oxyeleotris nullipora Roberts, 1978 Fr native   4.00 cm SL male/unsexed  Known from Bensbach and middle Fly rivers, but probably widespread in the Fly Delta. Also Ref. 6771, 13533. 
Butidae Oxyeleotris paucipora Roberts, 1978 Fr native   4.50 cm SL male/unsexed  Known from the Upper Fly and Bensbach rivers. In the Fly system, it has been found between 830-900 km upstream from the sea. Also Ref. 6771, 13533.  No picture yet.
Butidae Oxyeleotris urophthalmus (Bleeker, 1851) Fr native   28.00 cm TL male/unsexed   
Ambassidae Parambassis confinis (Weber, 1913) Fr native  Sepik River perchlet (English)  10.00 cm SL male/unsexed  Known from Gogol, Ramu and Sepik river systems. Also Ref. 6192, 13533.  No picture yet.
Ambassidae Parambassis gulliveri (Castelnau, 1878) Fr native  Giant river perchlet (English)  24.00 cm SL male/unsexed  Known from Purari, Pie, Ok Tedi, Strickland, Fly and Oriomo river systems. Also Ref. 6192, 13533, 75154. 
Mugilidae Paramugil parmatus (Cantor, 1849) Fr, Br, M native   30.00 cm TL male/unsexed  Found in the lower Fly River (Ref. 13533). Also Ref. 9812. 
Soleidae Pardachirus poropterus (Bleeker, 1851) Fr, Br native   7.00 cm SL male/unsexed  Recorded from Madang.  No picture yet.
Soleidae Pardachirus rautheri (Chabanaud, 1931) Fr, Br native      No picture yet.
Oxudercidae Periophthalmus argentilineatus Valenciennes, 1837 Fr, Br, M native  Barred mudskipper (English)  19.00 cm TL male/unsexed  Usually found in brackish mangrove and nipa palm areas, but occasionally enters in the lower sections of freshwater streams (Ref. 2847). Also Ref. 5218 and 6771. 
Oxudercidae Periophthalmus novaeguineaensis Eggert, 1935 Fr, Br questionable   8.00 cm SL male/unsexed  Recorded from central Papua and Baimuru in the Gulf of Papua (Ref. 6771); also from Fly river (Ref. 13533). Also Ref. 50786, 76839. 
Serrasalmidae Piaractus brachypomus (Cuvier, 1818) Fr introduced   88.00 cm TL male/unsexed  The fish originally entered Malaysia from Brazil, possibly via Taiwan. The genetic composition of the stock is dubious and is possibly already subject to in-breeding. A total of 14,511 individuals were released in 9 locations (remote lakes in the lower and middle Sepik, Bunapas, in the lower and middle Ramu and Brahman area (Ref. 37808). Started attacking other fishes in the Sepik and Ramu rivers in 1999 when their main food, insects became scarce. There are also reports on human attacks. Causes ecological imbalance by killing local fish and wiping out eggs and fry (Ref. 39336). 
Terapontidae Pingalla lorentzi (Weber, 1910) Fr native  Lorentz's grunter (English)  20.00 cm SL male/unsexed  Found in Fly, Morehead and Bensbach rivers. Occurs well upstream in all these systems; as far as about 870-900 km from the sea in the Fly River. Also Ref. 6192, 7300, 13533, 75154.  No picture yet.
Mugilidae Planiliza alata (Steindachner, 1892) Fr, Br, M native  Basket mullet (English), Diamond mullet (English)  75.00 cm TL male/unsexed  Recorded from the Sepik River near Angoram (Ref. 2847). Also recorded from middle Fly R., some Purari R. locations and other coastal rivers of western Papua (Ref. 6192) Also Ref. 9812, 13533. 
Mugilidae Planiliza macrolepis (Smith, 1846) Fr, Br, M native  Large-scaled mullet (English)  60.00 cm SL male/unsexed  Recorded from the Sepik River near Angoram (Ref. 2847). 
Mugilidae Planiliza melinoptera (Valenciennes, 1836) Fr, Br, M native  Cream mullet (English)  30.00 cm SL male/unsexed  Occurs in coastal waters, estuaries and rivers. Recorded from the Sepik River near Angoram and the lower Ramu River. Museum: Lake Yamor, NSMT-P2998 (Ref. 27471). Also Ref. 2847, 6192. 
Mugilidae Planiliza ordensis (Whitley, 1945) Fr, Br, M native      No picture yet.
Mugilidae Planiliza planiceps (Valenciennes, 1836) Fr, Br, M native  Rock mullet (English)  70.00 cm TL male/unsexed  Recorded from the Sepik River in backwaters near Angoram (Ref. 2847) and Kikori and Purari river systems of the Gulf (Ref. 6192). 
Mugilidae Planiliza subviridis (Valenciennes, 1836) Fr, Br, M native  Green back mullet (English)  40.00 cm SL male/unsexed  Also Ref. 2847. 
Ariidae Plicofollis polystaphylodon (Bleeker, 1846) Fr, Br, M native   35.00 cm SL male/unsexed  Known from Vanimo, off the Sepik River mouth, the Murik Lakes, and Broken Water Bay.  
Plotosidae Plotosus papuensis Weber, 1910 Fr native  Papuan catfish-eel (English)  55.00 cm TL male/unsexed  Known from the Upper and Middle Fly River. Also Ref. 6993, 13533. 
Poeciliidae Poecilia reticulata Peters, 1859 Fr introduced  Guppy (English) common (usually seen) 5.00 cm SL male/unsexed ;6.00 cm SL female  Introduced to the Port Moresby. Abundant in some parts of the Goldie river and its smaller tributaries. Also Ref. 6993, 1739. 
Polynemidae Polydactylus macrochir (Günther, 1867) Fr, Br, M native  Longfinned threadfin (English)  170 cm FL male/unsexed  Known from the southern coast of the country (Ref. 57343). Common along the coast and delta areas. Found in Daru and the Gulf of Papua. Also Ref. 1585, 6192, 9685, 75154, 78751. 
Plotosidae Porochilus meraukensis (Weber, 1913) Fr native  Merauke River catfish (English)  24.00 cm TL male/unsexed  Known from the Fly River and Balimo Lagoon, but probably occurs throughout the Fly Delta. In the Middle Fly system, it is usually found in quiet backwaters or in well vegetated, swampy lagoons and lakes. Also Ref. 6993, 13533.  No picture yet.
Plotosidae Porochilus obbesi Weber, 1913 Fr native  Obbes' catfish (English)  12.00 cm TL male/unsexed  Found in the Oriomo and Middle Fly rivers. Also Ref. 6993, 7300, 13533, 75154.  No picture yet.
Ariidae Potamosilurus macrorhynchus (Weber, 1913) Fr native  Sharp-nosed catfish (English)  50.00 cm SL male/unsexed  Known from the Purari and Fly rivers. Has been recorded from the main channel of the Upper Fly in lowlands near Kiunga, about 830 km upstream from the sea. Also Ref. 6993, 13533.  No picture yet.
Butidae Prionobutis microps (Weber, 1907) Fr native  Small-eyed loter (English)  23.00 cm SL male/unsexed   
Pristidae Pristis microdon Latham, 1794 Fr, Br, M native  Sawfish (English)  700 cm TL male/unsexed  Confirmed records from several major river basins (Ref. 6871). Common in the Middle Fly River, Middle and Lower Sepik and Ramu rivers (Ref. 9859); Digul, Laloki, Oriomo river and Lake Murray (Ref. 41819). Also Ref. 13533. 
Gobiidae Pseudogobiopsis rubrimaculosa Allen & Larson, 2020 Fr native   2.42 cm SL male/unsexed  Type locality of Pseudogobiopsis rubrimaculosus, Luap Creek, north of Bewani Village on Vanimo-Bewani road (Ref. 123360).  No picture yet.
Gobiidae Pseudogobius melanosticta (Day, 1876) Fr, Br native   4.00 cm SL male/unsexed  Collected from a stream behind Trobriand Hotel, Kiriwinna, Trobriand Is. (Ref. 43716).  No picture yet.
Gobiidae Pseudogobius poicilosoma (Bleeker, 1849) Fr, Br native   6.50 cm TL male/unsexed  Known from Klipong and Mamapiri rivers (Ref. 419); also collected from Dogura Creek, SE of Port Moresby and Meiro River, Madang (Ref. 43716). 
Pseudomugilidae Pseudomugil connieae (Allen, 1981) Fr endemic  Popondetta blue-eye (English)  5.00 cm SL male/unsexed ;4.00 cm SL female  Found within a 50 km radius of Popondetta. Also Ref. 6993. 
Pseudomugilidae Pseudomugil furcatus Nichols, 1955 Fr endemic  Forktail blue-eye (English)  5.00 cm SL male/unsexed ;4.00 cm SL female  Known from lowlands between Dyke Ackland Bay and Collingwood Bay. Abundant near Safia in clear rainforest streams with thick vegetative cover. Also Ref. 6993. 
Pseudomugilidae Pseudomugil gertrudae Weber, 1911 Fr native  Gertrude's blue-eye (English)  3.80 cm SL male/unsexed  Known from the Pahoturi, Lower Fly and Bensbach rivers. Also Ref. 6993, 13533, 75154. 
Pseudomugilidae Pseudomugil inconspicuus Roberts, 1978 Fr, Br, M native  Tiny blue-eye (English)  3.50 cm TL male/unsexed  Collected from lower Fly River and Bristow Island near Daru. Also Ref. 6993, 9786, 13533, 75154. 
Pseudomugilidae Pseudomugil novaeguineae Weber, 1907 Fr native  New Guinea blue-eye (English)  3.59 cm SL male/unsexed  In the Fly River system, it has been collected only from tributaries of the upper Fly at distances from 835-930 km upstream from the sea. Also Ref. 6993, 13533. 
Pseudomugilidae Pseudomugil paludicola Allen & Moore, 1981 Fr native   3.50 cm TL male/unsexed  Known from swamp lands of the lower Binaturi, Pahoturi, and More-head rivers of the south-western Papua New Guinea. Also Ref. 6993. 
Pseudomugilidae Pseudomugil paskai Allen & Ivantsoff, 1986 Fr endemic  Paska's blue-eye (English)  3.00 cm SL male/unsexed  Type locality of Pseudomugil paskai, small creeks near Kiunga in the upper Fly River system, approximately 830-850 km upstream from the sea. Also Ref. 13533, 123693. 
Pseudomugilidae Pseudomugil tenellus Taylor, 1964 Fr native   5.50 cm SL male/unsexed  Known only from the Bensbach River. Also Ref. 5259, 6993, 7300, 50786, 75154. 
Gobiidae Redigobius balteatus (Herre, 1935) Fr native   3.80 cm SL male/unsexed  Known from the Madang area (Kanudi and Australian Museum collections). In range Ref. 7050. 
Gobiidae Redigobius bikolanus (Herre, 1927) Fr, Br, M native   4.90 cm TL male/unsexed  Occurs throughout coastal areas, either in creeks and rivers or in brackish estuaries (Ref. 2847). Known from Sepik-Ramu river (Ref. 13533). Also Ref. 6771. 
Gobiidae Redigobius chrysosoma (Bleeker, 1875) Fr, Br native   4.90 cm TL male/unsexed  Recorded from Daru, western Papua. 
Gobiidae Redigobius nanus Larson, 2010 Fr native   2.22 cm SL male/unsexed   
Gobiidae Redigobius oyensi (de Beaufort, 1913) Fr native     
Gobiidae Redigobius tambujon (Bleeker, 1854) Fr native   4.50 cm SL male/unsexed  Known from Madang, Kavieng (Ref. 84480). Found in Fly river (Ref. 13533). 
Rhyacichthyidae Rhyacichthys aspro (Valenciennes, 1837) Fr native  Loach goby (English)  25.00 cm SL male/unsexed  Also Ref. 6771, 92840. 
Salmonidae Salmo trutta Linnaeus, 1758 Fr introduced  Brown trout (English)  140 cm SL male/unsexed  Introduced to the Central Highlands. Also Ref. 6993, 1739. 
Salmonidae Salvelinus fontinalis (Mitchill, 1814) Fr introduced  Brook trout (English)  86.00 cm SL male/unsexed   
Scatophagidae Scatophagus argus (Linnaeus, 1766) Fr, Br, M, Fi native  Spotted scat (English)  45.00 cm TL male/unsexed  Common in silty bays and harbors and in mangrove estuaries (Ref. 2847). Juveniles sometimes enter fresh water, but usually remain within a few km of the sea (Ref. 2847). Known from Kimbe bay (Ref. 28888), Fly, Sepik-Ramu river systems (Ref. 13533). 
Gobiidae Schismatogobius alleni Keith, Lord & Larson, 2017 Fr native   2.76 cm SL male/unsexed ;3.33 cm SL female  Known from Uruf Creek of the Markham River and Ularimbin creek of the East Sepik in northern Papua New Guinea (Ref. 116768).  No picture yet.
Gobiidae Schismatogobius baitabag Keith, Lord & Larson, 2017 Fr native   2.78 cm SL male/unsexed  Known from Nagada River, Baitabag Village in Madang (Ref. 116768).  No picture yet.
Gobiidae Schismatogobius bruynisi de Beaufort, 1912 Fr native   4.90 cm SL male/unsexed  Collected from a creek entering Ginap R., tributary of Rempi R., 1 km W Bitetta, Madang, CAS 63588 (Ref. 39635). 
Osteoglossidae Scleropages jardinii (Saville-Kent, 1892) Fr, Or native  Jardine's barramundi (English), Spotted barramundi (English) scarce (very unlikely) 100.00 cm SL male/unsexed  Known from streams and lakes in the Western Province, including Strickland (Ref. 83518), Bensbach, Morehead and Fly rivers and Lake Murray (Ref. 58511). People of Bensbach River area have been harvesting wild fingerlings for sale across the nearby international border in Indonesia's Papua Province (Ref. 58511). A total of 50,000 juveniles caught in the wild were exported to Singapore in November 2003 (purchased at a total cost of K70, 000 ~ 21,350 USD). In 2004, a single juvenile cost K1.30 ~ 0.41 USD, a substantial amount in the Obo and Lake Murray areas and a fisherman is estimated to earn around K300 per day ~95 USD during the breeding season, effecting an increase in fishing effort. In 2004 and 2005 (Ref. 83518). Relatively low population of adults in the wild due to slow maturation and low fecundity. Collection of juveniles for the aquarium trade could become non-sustainable if caution is not exercised (Ref. 83518). Also Ref. 6993, 13533, 75154. 
Engraulidae Setipinna tenuifilis (Valenciennes, 1848) Fr, Br, M native  Hairfin anchovy (English)  22.00 cm SL male/unsexed  Recorded from the Gulf of Papua (Ref. 6771). Found near the mouth of the Fly River (Ref. 13533). Also Ref. 189. 
Gobiidae Sicyopterus cynocephalus (Valenciennes, 1837) Fr native   16.50 cm TL male/unsexed  Reported from creeks near Kokoda and Wewak (Ref. 2847). Also Ref. 6771. 
Gobiidae Sicyopterus lengguru Keith, Lord & Hadiaty, 2012 Fr native   9.00 cm SL female   
Gobiidae Sicyopterus longifilis de Beaufort, 1912 Fr native   9.70 cm TL male/unsexed  Reported from Gogol River and from a creek near Wewak (Ref. 2847). Museum: CAS 63389 (Ref. 11224). Also Ref. 6771. 
Gobiidae Sicyopterus macrostetholepis (Bleeker, 1853) Fr questionable   10.30 cm TL male/unsexed  Specimens from Goodenough Is. probably belong to this species (Ref. 6771). 
Gobiidae Sicyopterus micrurus (Bleeker, 1853) Fr native   9.50 cm TL male/unsexed  Known from Mandi Stream near Wewak. Also Ref. 6771. 
Gobiidae Sicyopterus ocellaris Keith, Allen & Lord, 2012 Fr native   4.10 cm SL male/unsexed ;3.83 cm SL female  Found only in the Nuru River, northeastern Papua New Guinea (Ref. 90225).  No picture yet.
Gobiidae Sicyopterus ouwensi Weber, 1913 Fr questionable   10.00 cm SL male/unsexed  Specimens from Balimo, Goodenough Is. and Bougainville probably belongs to this species. Occurrence needs confirmation.  No picture yet.
Gobiidae Sicyopterus stiphodonoides Keith, Allen & Lord, 2012 Fr native   3.27 cm SL male/unsexed    No picture yet.
Gobiidae Sicyopus beremeensis Keith, Amick, Toko & Lord, 2019 Fr native   5.68 cm SL male/unsexed ;5.05 cm SL female  Type locality of Sicyopus beremeensis, Wani Creek, New Britain (Ref. 120563).  No picture yet.
Gobiidae Sicyopus discordipinnis Watson, 1995 Fr native   3.01 cm SL male/unsexed ;3.43 cm SL female  Type locality, 25 km southeast of Wewak, LetakCreek, WAM P.27834-004 (holotype of Sicyopus discordipinnis, 2.54 cm SL, male) (Ref. 87905). Presently occurs in single stream localities from northern New Guinea and the islands of New Hanover and Bougainville (Ref. 26726).  No picture yet.
Gobiidae Sicyopus zosterophorus (Bleeker, 1856) Fr native   4.50 cm SL male/unsexed ;4.20 cm SL female  Known from a small rocky creek at Oro Bay near Popondetta. Also found in Bismarck Archipelago (New Hanover) and Bougainville. Several specimens were collected from a torrential stream cascading down the side of a steep mountain near Arawa, Bougainville (Ref. 2847). Also Ref. 6771, 7050. 
Sillaginidae Sillago sihama (Fabricius, 1775) Fr, Br, M native  Northern whiting (English)  31.00 cm SL male/unsexed  Known from Kimbe bay (Ref. 28888). 
Mugilidae Squalomugil nasutus (De Vis, 1883) Fr, Br native  Mud mullet (English), Shark mullet (English)   Known from the Purari and Kikori River systems. Also Ref. 9812, 75154.  No picture yet.
Gobiidae Stenogobius alleni Watson, 1991 Fr native   3.65 cm SL male/unsexed ;3.91 cm SL female  Type locality: Tovarua Stream near public beach, New Britain I., Bismarck Archipelago, Papua New Guinea.  No picture yet.
Gobiidae Stenogobius beauforti (Weber, 1907) Fr native   4.82 cm SL male/unsexed ;4.98 cm SL female  Recorded from Wewak and Maiwara (Ref. 6771).  No picture yet.
Gobiidae Stenogobius genivittatus (Valenciennes, 1837) Fr, Br, M native  Chin-band goby (English)  18.00 cm SL male/unsexed  Found near the mouth of the Fly River (Ref. 13533). 
Gobiidae Stenogobius hoesei Watson, 1991 Fr native   6.08 cm SL male/unsexed  Type locality: Small freshwater creek, 1.5 km southeast of Lorengau, Manus I., Admiralty Is., Papua New Guinea.  No picture yet.
Gobiidae Stenogobius laterisquamatus (Weber, 1907) Fr native   20.00 cm SL male/unsexed  Found in Ramu, Gogol and Sepik rivers (Ref. 2847). Also Ref. 6771, 13533, 46548.  No picture yet.
Gobiidae Stenogobius psilosinionus Watson, 1991 Fr native   9.65 cm SL male/unsexed  Type locality: Lower Fly R., 236 km upriver from Toro Pass, Papua New Guinea.  No picture yet.
Gobiidae Stenogobius watsoni Allen, 2004 Fr native   6.47 cm SL male/unsexed  Found only in Milne Bay Province. Recorded from the Laiavakain Creek in Woodlark Island, Imgamanina Creek in Misima Island, Waidala River in Goodenough Island and Mebulibuli River in Fergusson Island of the D'Entrecasteaux Islands, and Kalitau Creek in Tagula Island and Woa River in Rossell Island of the Louisiade Archipelago (Ref. 77028). 
Gobiidae Stiphodon atratus Watson, 1996 Fr native   6.00 cm SL male/unsexed ;4.24 cm SL female  Known from the streams of New Guinea, the Admiralty Islands, the Bismarck Archipelago and Bougainville. Also Ref. 33064. 
Gobiidae Stiphodon birdsong Watson, 1996 Fr native   2.29 cm SL male/unsexed ;2.11 cm SL female  Known from the northern New Guinea in Letak Creek, 25 km southeast of Wewak.  No picture yet.
Gobiidae Stiphodon elegans (Steindachner, 1879) Fr native   5.20 cm SL male/unsexed  Recorded from northern Papua, Finschafen Peninsula and Wewak Is. 
Gobiidae Stiphodon larson Watson, 1996 Fr native   3.14 cm SL male/unsexed ;3.30 cm SL female  Known from the Gogol River system and the area around Madang on the northern coast of New Guinea.  No picture yet.
Gobiidae Stiphodon rutilaureus Watson, 1996 Fr native   4.50 cm SL male/unsexed ;2.98 cm SL female  Known from the northern slopes of New Guinea and Bismarck Archipelago. 
Gobiidae Stiphodon semoni Weber, 1895 Fr native   4.58 cm SL male/unsexed ;4.20 cm SL female  Museum: CAS 63387 (Ref. 11224). 
Engraulidae Stolephorus indicus (van Hasselt, 1823) Fr, Br, M native  Indian anchovy (English)  15.50 cm SL male/unsexed  Found near the mouth of the Fly River (Ref. 13533). Also Ref. 189. 
Engraulidae Stolephorus waitei Jordan & Seale, 1926 Fr, Br, M native   9.40 cm SL male/unsexed  Known from Fly river (Ref. 13533). Also Ref. 189. 
Belonidae Strongylura krefftii (Günther, 1866) Fr, Br native  Freshwater long-tom (English)  85.00 cm SL male/unsexed  Known from the Fly River. Found in lowland habitats of Fly as far inland as 830 km upstream. Also Ref. 6993, 13533, 75154.  No picture yet.
Belonidae Strongylura strongylura (van Hasselt, 1823) Fr, Br, M native  Spottail needlefish (English)  40.00 cm SL male/unsexed  Known from Kempwelch R., Bootless Bay, Toro Pass, Purari R. delta, Port Romilly, Daru wharf (Ref. 6993), and Fly river (Ref. 13533). 
Apogonidae Taeniamia buruensis (Bleeker, 1856) Fr, Br, M native  Buru cardinalfish (English)  7.50 cm SL male/unsexed  Reported from the freshwater of Normanby Island and also collected from Cape Ward Hunt (Ref. 54391). Also Ref. 37816, 90102. 
Gobiidae Taenioides anguillaris (Linnaeus, 1758) Fr, Br, M native   40.00 cm TL male/unsexed  Known only from the stomach contents of a seasnake captured in the Lower Ramu River; also from Sepik-Ramu river (13533). 
Gobiidae Taenioides cirratus (Blyth, 1860) Fr, Br, M native   30.00 cm TL male/unsexed  Known from the Lower Fly River (Ref. 2847). Also Ref. 6771, 13533. 
Eleotridae Tateurndina ocellicauda Nichols, 1955 Fr endemic  Peacock-eye gudgeon (English)  7.50 cm TL male/unsexed  Known from the north-eastern side of the Owen Stanley Range. Commonly found in the rainforest streams in the vicinity of Popondetta and Safia. Also Ref. 2060, 6771. 
Terapontidae Terapon jarbua (Fabricius, 1775) Fr, Br, M, Fi native  Crescent perch (English), Dogigi (Misima-Paneati)  36.00 cm TL male/unsexed  Known from Kimbe bay (Ref. 28888). Also Ref. 6192. 
Ambassidae Tetracentrum apogonoides Macleay, 1883 Fr endemic  Four-spined perchlet (English) common (usually seen) 12.50 cm SL male/unsexed  Known from the vicinity of Port Moresby. Thus far collected from the Brown, Goldie, Laloki and Kemp Welsh rivers. Also common in Sirinumu Reservoir (Laloki River) on the Sogeri Plateau at an elevation of 540 m. Also Ref. 6192.  No picture yet.
Ambassidae Tetracentrum caudovittatus (Norman, 1935) Fr, Fi endemic  Kokoda glass perchlet (English), Kokoda perchlet (English)  11.00 cm SL male/unsexed  Known from creeks near Kokoda at elevations of 300-400 m. May have misidentified as T. honessi. Also Ref. 6192.  No picture yet.
Ambassidae Tetracentrum honessi (Schultz, 1945) Fr endemic  Honess' perchlet (English)  11.50 cm SL male/unsexed  Known only from a small area north of the Owen Stanley Range. Thus far collected from the Moni River and its tributaries near Safia and in lowland streams around Popondetta. Also Ref. 6192.  No picture yet.
Engraulidae Thryssa rastrosa Roberts, 1978 Fr endemic   12.00 cm SL male/unsexed  Known only from the Upper and Middle Fly River system, up to about 850 km upstream from the mouth. Also Ref. 189, 6993, 13533. 
Engraulidae Thryssa scratchleyi (Ramsay & Ogilby, 1886) Fr, Br, M native  Freshwater anchovy (English)  40.00 cm SL male/unsexed  Known from the Fly and Strickland rivers. Found both in brackish estuaries and well inlands, as far as 900 km upstream in the Fly system. Also Ref. 189, 6993, 13533, 75154. 
Toxotidae Toxotes chatareus (Hamilton, 1822) Fr, Br, M native   40.00 cm SL male/unsexed  Recorded from Balimo and Bensbach,Fly, Sepik, Laloki and Morehead and Purari rivers (Ref. 6192). Frequently found well inland, for example as far as 800 km upstream in the Fly River (Ref. 2847). Also Ref. 13533. 
Toxotidae Toxotes jaculatrix (Pallas, 1767) Fr, Br, M native   30.00 cm TL male/unsexed  Generally found in mangrove swamps, sometimes in brackish water. Seldon penetrates fresh water. 
Toxotidae Toxotes lorentzi Weber, 1910 Fr native   18.00 cm SL male/unsexed  Known from Balimo Lagoon and the Lower Fly River (Lake Daviumbu), but more widespread in the Fly Delta area. Also Ref. 13533, 75154.  No picture yet.
Osphronemidae Trichopodus pectoralis Regan, 1910 Fr introduced  Snakeskin gouramy (English)  25.00 cm TL male/unsexed  Introduced to the Western Highlands, Central and Gulf districts. Also Ref. 1739. 
Osphronemidae Trichopodus trichopterus (Pallas, 1770) Fr introduced  Three-spot gouramy (English) common (usually seen) 15.00 cm SL male/unsexed  Common in a few streams near Port Moresby. Also Ref. 1739. 
Dasyatidae Urogymnus polylepis (Bleeker, 1852) Fr native   240 cm WD male/unsexed  Known from the Fly River basin. Also Ref. 75154. 
Terapontidae Variichthys lacustris (Mees & Kailola, 1977) Fr endemic  Lake grunter (English)  17.00 cm SL male/unsexed  Known only from the Fly River Delta region. Has been recorded from the Balimo area, lower Fly River, including Lake Murray, and from the Morehead River. Also Ref. 6192, 13533, 75154.  No picture yet.
Poeciliidae Xiphophorus hellerii Heckel, 1848 Fr introduced  Swordtail (English) common (usually seen) 14.00 cm TL male/unsexed ;16.00 cm TL female  Introduced to the Wau-Bulolo district. Abundant in streams near Wau in 1981. Also Ref. 1739. 
Apogonidae Yarica hyalosoma (Bleeker, 1852) Fr, Br, M native  Humpbacked cardinalfish (English) occasional (usually not seen) 17.00 cm TL male/unsexed  Inhabits brackish and mangrove areas, at 0-2 m (Ref. 11890). Also Ref. 2847, 1601. In range Ref. 7050, 559. 
Oxudercidae Zappa confluentus (Roberts, 1978) Fr, Br, M native   4.40 cm SL male/unsexed  Known from the lower parts of the Fly, Sepik-Ramu rivers (Ref. 13533). Also Ref. 6771, 92840. 
Zenarchopteridae Zenarchopterus caudovittatus (Weber, 1907) Fr native  Long-jawed river-garfish (English)  14.00 cm SL male/unsexed  Also Ref. 75154.  No picture yet.
Zenarchopteridae Zenarchopterus dispar (Valenciennes, 1847) Fr, Br, M native  Feathered river-garfish (English)  19.00 cm TL male/unsexed  Occurs near the mouth of the Fly River (Ref. 13533); and from Kimbe bay (Ref. 28888). Also Ref. 6798. 
Zenarchopteridae Zenarchopterus kampeni (Weber, 1913) Fr native  Sepik River halfbeak (English), Van Kempen's river-garfish (English)  20.70 cm SL male/unsexed ;17.50 cm SL female 14.7 SL Known from the Sepik and the adjoining and interconnecting Ramu River. Also Ref. 2847, 6993, 13533.  No picture yet.
Zenarchopteridae Zenarchopterus novaeguineae (Weber, 1913) Fr native  Fly river-garfish (English)  20.00 cm SL male/unsexed  Known from the Fly and Laloki river systems. In the Fly system, it has been collected 915 km upstream at an elevation approximately 52 m. Also Ref. 6993, 13533, 75154. 
Zenarchopteridae Zenarchopterus quadrimaculatus Mohr, 1926 Fr, Br, M native      No picture yet.
Zenarchopteridae Zenarchopterus robertsi Collette, 1982 Fr endemic  Robert's river-garfish (English)  13.00 cm SL male/unsexed  Known only from creeks in the vicinity of Kokoda in southeastern Papua New Guinea. Also Ref. 6993.  No picture yet.
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