
Serpae Tetra
Hyphessobrycon eques
- Care level
- Intermediate
- Adult size
- 3–4 cm
- Minimum tank
- 70 litres
- Temperature
- 20–28 °C
Species profile
Crenuchus spilurus
Common names: Sailfin Tetra, Sailfin Characin

An unusual, chunky fish with a tall dorsal fin on the male, also called the Sailfin Characin. Keep alone or in a small group in 68 litres or more.
An unusual, chunky fish with a tall dorsal fin on the male, also called the Sailfin Characin. It behaves more like a small cichlid, guarding eggs in a cave, and it is usually kept as a pair.
Check the scientific name when buying, as common names vary between sellers and countries.
Males usually grow larger, with longer fins, but sexing can be hard outside breeding.
Provide wood, rocks and clear territories, with enough open water for a fish of this size. Strong filtration helps, because cichlids produce a lot of waste.
A characterful fish that interacts with its surroundings and often recognises its keeper.
Often best as a pair, or as a small group in a roomy tank.
Can be territorial, especially when breeding.
Choose tankmates with care, by size and temperament. It may eat much smaller fish, and it can harass peaceful ones when breeding. It is likely to eat shrimp.
Needs soft, acidic water.
Takes good-quality pellets, along with frozen foods for variety.
Feed small amounts, and remove anything left after a few minutes.
Spawns inside a cave, and one parent guards the eggs and young. Provide a suitable cave for each pair.
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