双带魮脂鲤 · Yellow Tetra

Overview

Usually peaceful, Hyphessobrycon bifasciatus carries two upright shoulder markings, with the forward mark more prominent. Keep a mixed-sex group of at least eight to ten so its social behavior can develop naturally.

Distribution & habitat

The range includes coastal drainages of southeastern Brazil from Espírito Santo to Rio Grande do Sul, plus parts of the upper Paraná. Forest-covered floodplain tributaries, lakes, and streams provide habitat.

Diet & feeding

It is probably an opportunistic omnivore in nature, taking aquatic invertebrates, fallen fruit, and similar foods. Aquarium feeding is straightforward: combine quality flakes or granules with small live and frozen bloodworms, water fleas, and brine shrimp. Include some plant- or algae-enriched prepared foods.

Behaviour & compatibility

Comparable peaceful tetras, hatchetfishes, pencilfishes, small armored catfishes, and nonpredatory medium-sized cichlids are possible companions. Maintain a substantial mixed-sex shoal, with other suitable schooling fishes helping provide confidence.

Sexual dimorphism

Well-conditioned males are slightly more colorful. Females generally grow larger and rounder, particularly when carrying eggs.

Breeding

Eggs are scattered without parental care.

Notes

Some fish develop a metallic golden appearance on part or all of the scales. A parasitic cause has been suggested but remains uncertain; observed individuals appear unaffected in comfort, health, and longevity. Gold coloration alone is therefore not a diagnosis. The paired shoulder marks, lack of a tail-base blotch, and absence of a filamentous male dorsal fin provide useful identification clues.