Slender Harlequin Tropical Fish Information

Trigonostigma espei
Slender Harlequin
Behaviour Peaceful, shoaling
Typical size 3cm
Max size 4cm
Tank Area Middle, all
Min Tank Size 45cm
Min Number in Tank 5
Temp Min: 24℃ Max: 28℃
Feeding Flake, frozen, live foods
pH Range 6-7.5
Hardness vs,s,m
Slender Harlequin Trigonostigma espei
  • Slender Harlequin Trigonostigma espei - thumbnail

Slender Harlequin (Trigonostigma espei)

Slender Harlequin Tropical Fish Learn all about the Slender Harlequin's feeding habits and food types, its behaviour, its origins, its natural habitats, is it male or female, breeding advice and information, suitable tank mates, its sizing and growth range, minimum tank size, water PH and more. Use our fish community creator tool to plan your tank set up and ensure that the Slender Harlequin is the right fish for your aquarium.

The Slender Harlequin is very similar in appearance to the Harlequin but has a narrower body and a smaller dark patch. The Slender Harlequin is very peaceful and only grows to 4cm so is best mixed with other peaceful, small fish. Provide some heavily vegetated areas and hiding spots and avoid mixing with boisterous fish. Water quality must be kept high and whilst the fish may adapt to harder water, over the long term they are best kept in neutral to acidic water with a soft to medium hardness. A good tank mate for timid or sensitive fish.

Slender Harlequin Facts

Family Cyprinidae (Minnows & Carps) | Synonyms Rasbora heteromorpha espei, Rasbora espei | Other names Lambchop Rasbora | Origin Asia; Thailand, Cambodia | Breeding Open water egg scatterers | Natural Water Conditions pH 6-6.5, medium | Natural Habitat Heavily vegetated pools, ponds, and swamps | Sexing Males are thinner and brighter coloured



Slender Harlequin Help and Advice

If you have a question about keeping Slender Harlequin's then please use our Slender Harlequin help forum. Join 100's of other fish enthusiasts with 1000's of years experience between them caring for and keeping fish like these.


question mark     


Check tank mates for the Slender Harlequin fish species

You are in the thinkfish community creator for the Slender Harlequin fish species, you can learn all about how the tool works in assessing fish tank mate compatibility at the link provided or use the tool tips provided to guide you. Create a test fish community that includes the Slender Harlequin species and any other types of fish or crustacean you'd like to introduce - You can assess the best companions, tank size suitability, stocking levels based on filter type and volume and possible negative interactions and warnings as you build up your aquarium.

Please do check your water type for compatibility with your fish, which can be found on the Slender Harlequin information box above and your local water company providers website. Don't waste your money and endanger your fish!
Tank Details
question mark  Rename your tank:
question mark  Length: (cm)
question mark  Volume: (Litres)
question mark  Filter type:

* Recent changes to stocking & filter advice October 2018
* This fishtank will only last for this session - to save your tank please Join/Log in


Stocking
question mark  Max Stocking level: 0cm
0-1 months 20%: 0cm
1-3 months 40%: 0cm
3-6 months 60%: 0cm
question mark  Current stock level: 0cm
Stock percentage: 0%
question mark  Suggested maximum
fish size for your tank:
0cm
My Fishtank Quantity Stock cm

There are currently no fish in your fish tank. To add fish, you can click the 'Add the Slender Harlequin to your tank' button. Or search for a different fish using the options presented above

sample fish tank
See an example tank as it would show on a user profile with enabled settings and community tanks.

To save your tank details in the Fish Community Creator you must be logged in CLICK HERE to login or create an account further down the page below


If you'd like to talk about the "Slender Harlequin" with our users, then we have a buzzing community of fish enthusiasts where you can talk about tank issues, Slender Harlequin fish behaviour, Slender Harlequin tank stocking and any other issues related to the Slender Harlequin fish or other types you may have.

Help us keep great tools like this online by becoming a think fish supporter . You will help with our hosting and development costs. From as little as £1.16 per month - Become a Supporter today


Click to read the Latest Tropical Fish discussions from Thinkfish users.

Think Fish Tropical Fish Forum
Tropical Fish Market Place
Fish of the month


Helping Fishkeepers With Their Fishkeeping Needs Since 2006