Family: Characidae
Black Hifin Tetra — a Characidae from South America, peaceful mid-water shoaler; confidence comes in numbers. Reaches 2.7–4 cm; groups of 8 minimum; more is visibly better. 23–27 °C.
Gymnocorymbus ternetzi is a Characidae from South America. In the wild it prefers blackwater streams and flooded forest; in the aquarium it stays peaceful mid-water shoaler. Plan on 2.7–4 cm of adult fish at 23–27 °C. In a community tank it pairs well with Small Corydoras.
Difficulty: moderate. Peaceful mid-water shoaler; confidence comes in numbers. Groups of 8 minimum; more is visibly better.
Hold 23–27 °C and keep it stable — 23.0–27.0 °C typical for the family. Heater for stable tropical warmth.
Expect 2.7–4 cm as an adult, living middle of the water column. A 25 L tank or larger gives it room.
Small omnivore; quality flakes and small frozen foods. Feed two small meals a day rather than one large one.
Yes, with care. Peaceful mid-water shoaler; confidence comes in numbers — pair it with Small Corydoras — Share the lower water peacefully and skip Large or predatory fish — Tetras are snacks.
Native to South America, where it lives in blackwater streams and flooded forest. Still to gentle current; Moderate.
Low escape risk, but a lid is cheap insurance.
Typical egg-scattering characin; adults eat the eggs. Subtle; females fuller-bodied.