Flag Tetra - Hyphessobrycon heterorhabdus : Complete Fish Profile & Care Guide
Table of contents
Introduction
The Flag Tetra (Hyphessobrycon heterorhabdus) is a species renowned for its tranquil nature, making it an excellent choice for inclusion in community aquariums alongside other congenial species. For optimal social dynamics, it is advisable to maintain these Tetras in groups comprising a minimum of eight individuals, given their natural inclination towards shoaling behaviour.
To observe the Flag Tetras in their most captivating display, it is recommended to house them in mixed-sex groups with a higher number of females. This setup encourages the males to exhibit their most vibrant colours and desirable behavioural patterns.
To ensure a harmonious environment for these Tetras, it is imperative to avoid housing them with larger or more aggressive fish that might impose intimidation. Instead, ideal tankmates for the Flag Tetras encompass diminutive and peaceful species, such as small Tetras, Pencilfish, as well as Dwarf Cichlids like Apistogramma or Mikrogeophagus. Additionally, smaller Catfish, such as Corydoras, prove to be compatible and beneficial companions.
Creating an optimal habitat for Belgian Flag Tetras entails a dimly lit aquarium adorned with driftwood, which not only induces a suitable ambience but also contributes to the acidification of the water. Driftwood releases tannins, replicating the brownish hue characteristic of their natural habitat. The integration of peat filtration may further aid in achieving these water conditions.
An abundant and diverse planting strategy featuring both floating and rooted vegetation is crucial to establish a secure and nurturing environment for the Flag Tetras. When designing the aquarium, it is advisable to opt for subdued lighting and darker substrate and background choices to enhance the vibrant display of the fish's colours.
The Flag Tetra showcases a striking appearance with a silvery body that reflects a translucent green hue. Distinguishing characteristics include a prominent yellow horizontal stripe flanked above by a red band and below by a bluish-black line extending from the gill covers to the base of the caudal fin. Notably, the fins of this species exhibit a transparent quality, further contributing to their allure.
Flag Tetra Photos
Sexual Dimorphism
Distinguishing between male and female Flag Tetras presents some challenges, as it requires a discerning eye for subtle physical disparities. Generally, females exhibit a deeper body structure and tend to be slightly larger in comparison to their male counterparts. Conversely, males possess a more streamlined and diminutive physique, with the distinctive characteristic of a hook on their anal fin, aiding in their identification.
Quick Facts
| Scientific Name | Hyphessobrycon heterorhabdus |
|---|---|
| Year Described | 1894 |
| Other Names | Belgian Flag Tetra, Three Banded Flag Tetra |
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Characiformes |
| Family | Characidae |
| Genus | Hyphessobrycon |
| Origins | Brazil , Colombia |
| Max Size | 3.5 cm |
| Temperament | Peaceful |
| Aquarium Level | Middle - Top |
| Difficulty | Intermediate |
| Shoaling | Yes |
| Best kept as | Groups 8+ |
| Diet & Feeding | Omnivore |
| Reproduction | Egg-Scatterer |
| Average Lifespan | Up to 5 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 5.5 - 7.5 |
| GH | 5 - 15 |
| TDS | 18 - 215 |
| ℉ | 73 - 82 |
|---|---|
| ℃ | 23 - 28 |
Natural Habitat
The distribution of Flag Tetras encompasses a wide range, spanning the lower and middle Amazon River Basins, spanning from Brazil to southern Colombia. However, their occurrence may be confined to tributaries and coastal drainages, specifically in the eastern states of Pará and Maranhão, with the Rio Tapajós serving as their upstream limit. These Tetras primarily inhabit small streams, displaying a notable preference for terra firme headwater tributaries situated to the east of the Rio Tocantins.
In their natural habitat, these habitats are characterized by the presence of forest cover or riparian vegetation, providing vital shading for the aquatic environment. The water is notably clear, with substrates predominantly composed of sand or mud, accompanied by the presence of submerged tree roots, fallen branches, and a layer of leaf litter. Aquatic vegetation is notably sparse in these habitats, distinguishing them as typical dwellings for Flag Tetras.
Breeding
Regrettably, comprehensive breeding reports pertaining to Flag Tetras are presently scarce, thus limiting the available knowledge on their specific reproductive behaviours. Nonetheless, it is reasonable to surmise that their spawning patterns resemble those observed in other members of the Hyphessobrycon genus.
For a successful breeding endeavour, it is advisable to prepare a breeding pair through conditioning, employing live foods such as mosquito larvae or brine shrimp. Selecting the most vibrant and robust male and pairing it with the healthiest female will yield favourable results. To optimize the breeding outcome, a separate breeding tank is essential to accommodate the highest number of fry.
The breeding tank necessitates specific environmental conditions, including soft and acidic water, a dark substrate, and subdued lighting. Slightly elevating the temperature above that of the regular tank will encourage spawning. Creating a suitable medium for egg deposition involves providing an abundance of fine-leaved plants, such as java moss or a designated spawning mop, as well as incorporating floating plants to regulate light levels.
Spawning in Flag Tetras typically occurs in the morning, with the female scattering her eggs onto the selected plants and substrate. After successful spawning, it is imperative to promptly remove the parents from the breeding tank, as they may consume both eggs and fry if given the opportunity.
The eggs usually hatch within a timeframe of 24 to 36 hours, and the fry will attain free-swimming capabilities three to four days thereafter. Rearing the fry is relatively straightforward, with nourishment typically consisting of Infusoria-type foods until they reach a size suitable for accepting newly hatched brine shrimp.
Diet & Feeding
In the confines of a home aquarium, Flag Tetras readily acclimate to a diverse array of nourishment, with a preference for high-quality dried foods encompassing granules, flakes, and sinking pellets. These contemporary food formulations are thoughtfully designed to encompass all essential nutrients required for sustaining the fish's overall health and dietary needs.
Complementing their diet with supplementary food sources, such as live, frozen, and freeze-dried options like mini bloodworms, daphnia, and tubifex, on a weekly basis can confer additional health benefits and contribute to the overall well-being of the fish. However, it is noteworthy that such supplementary offerings are not obligatory for this species.
In its natural habitat, the Flag Tetra is an omnivorous species exhibiting a propensity for consuming certain vegetable matter. While modern fish foods typically account for this aspect and integrate suitable plant-based components, it remains possible to further augment the fish's diet with blanched vegetables like spinach, broccoli, and zucchini.
A key consideration when feeding Flag Tetras is to exercise moderation and avoid overfeeding. Removing any uneaten portions of food the following day is essential in maintaining water quality and preventing potential health issues associated with excess food decomposition.
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