Bryconalestes longipinnis (African Long-finned Tetra)

Overview

The African Long-finned Tetra (Bryconalestes longipinnis), also widely known as the Longfin Tetra, is a highly active and attractive schooling fish native to the streams and rivers of West Africa. Known for its striking appearance and energetic swimming patterns, it adds a dynamic and captivating presence to larger community aquariums.

Distribution and Habitat

This species is widely distributed across West Africa, found in countries such as Senegal, Gambia, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, Nigeria, and Cameroon. It primarily inhabits fast-flowing streams and rivers, often in forested areas where the water is well-oxygenated and slightly acidic. They prefer natural habitats with plenty of open swimming space and overhanging marginal vegetation.

Description of African Long-finned Tetra

Body shape:

They possess a streamlined, elongated, and laterally compressed body, perfectly adapted for fast swimming and navigating through flowing waters.

Color:

The base coloration is a shimmering silver with a subtle greenish or yellowish iridescence under proper aquarium lighting. A distinct, bold black stripe runs along the caudal peduncle extending into the tail fin, often bordered by a bright golden-yellow hue just above it.

Barbels:

They do not have barbels.

Snout:

The snout is relatively short with a terminal mouth equipped with small, sharp teeth, which is a typical characteristic of the Alestidae family.

Eyes:

They have large, prominent eyes featuring a striking yellow or golden upper iris, which aids them in locating prey in moving water.

Fins:

As their common name suggests, mature males develop significantly elongated dorsal and anal fins, giving them a majestic and flowing appearance. Females possess shorter, more standard-sized fins. The fins themselves are generally translucent.

The Tail:

The caudal fin is deeply forked, clear to slightly yellowish, with the distinct black lateral band extending prominently through the middle rays.

Temper

They are generally peaceful but can be quite boisterous due to their high activity levels. Their fast swimming may occasionally stress or outcompete slower-moving or very timid fish for food.

Sociality

This is a strictly schooling species. They must be kept in groups of at least 6 to 8 individuals, though larger groups are highly recommended to reduce stress, curb any fin-nipping tendencies, and encourage them to display their natural behaviors and best colors.

Activity

They are extremely active swimmers, constantly on the move in the middle to upper levels of the aquarium. They require a significant amount of open swimming space to thrive.

Keeping and Caring for African Long-finned Tetra

Tank size:

Due to their potential adult size of up to 13 cm and their incredibly high activity level, a minimum tank length of 120 cm (48 inches), roughly equivalent to 200 liters (55 gallons), is strongly recommended.

Water Parameters:

Temperature

They thrive in tropical temperatures ranging from 22°C to 26°C (72°F - 79°F).

pH

The ideal pH range is slightly acidic to neutral, generally between 6.0 and 7.5.

Hardness

Soft to moderately hard water is preferred, typically ranging between 5 and 15 dGH.

Ammonia, Nitrite, Nitrate

Ammonia and Nitrite must always be at 0 ppm. Nitrates should be kept as low as possible, ideally below 20 ppm, through regular maintenance and water changes.

Lighting

Moderate lighting is best. While they can handle brighter lights, the addition of floating plants can help diffuse the light and make them feel more secure.

Water flow

They appreciate moderate to strong water flow, simulating their natural riverine habitats. Using powerheads or strong filter returns can provide this necessary current.

Decorations and Plants

The tank should feature plenty of open swimming space in the center. The perimeter and background can be heavily planted, and decorations like smooth river rocks and driftwood can be added to mimic a natural riverbed environment.

Diet

In the wild, they are omnivores, feeding heavily on insects that fall onto the water surface, as well as aquatic invertebrates and some plant matter. In the aquarium, they are unfussy and will eagerly accept high-quality flakes, pellets, and live or frozen foods such as bloodworms, daphnia, and brine shrimp.

Some Feeding Tips

Because they are fast and competitive eaters, observe feeding times to ensure that food reaches all tank mates, especially bottom-dwellers. Offering a varied diet will keep their colors vibrant and maintain their overall health.

Breeding

Breeding the African Long-finned Tetra in captivity is possible but can be somewhat challenging. They are egg-scatterers and do not show any parental care. A separate breeding tank with soft, slightly acidic water and dim lighting is required. Provide a spawning mop or fine-leaved plants for the eggs to fall into. After spawning occurs, the parents must be removed immediately to prevent them from eating the eggs. The fry are tiny upon hatching and require infusoria or specialized liquid fry food initially before moving on to larger fare.

Conclusion

The African Long-finned Tetra is a fantastic choice for aquarists looking for a relatively large, active, and visually appealing schooling fish for a spacious community tank. Provided they have enough room to swim and clean, well-oxygenated water with a good current, they are hardy and rewarding pets that bring endless energy and life to the aquarium.