Family: Cyprinidae
Onychostoma simum — a Cyprinidae from southern Chinese mountain streams, mostly peaceful community fish. Reaches 31.1–45.7 cm; singly or in small groups depending on temperament. 18–26 °C.
A Cyprinidae species native to southern Chinese mountain streams: Onychostoma simum lives bottom-dwelling over gravel. Mostly peaceful community fish. Adults reach 31.1–45.7 cm. It is one of the aquarium-kept Onychostoma species we profile, alongside Onychostoma barbatulum, Onychostoma angustistomata, Onychostoma elongatum.
Difficulty: moderate. Mostly peaceful community fish. Singly or in small groups depending on temperament.
Hold 18–26 °C and keep it stable — 18–26 °C typical for the genus. Room temperature to heated, depending on origin.
Full size is 31.1–45.7 cm. Minimum tank: 500 L, with open swimming space along its bottom-dwelling habits.
Accepts quality flakes, granules and frozen foods. It forages naturally over fine gravel and sand, so let some food reach the bottom.
Yes, with care. Mostly peaceful community fish — pair it with Similar-sized peaceful community fish — Compatible size and temperament and skip Fin-nippers — Constant stress.
Native to southern Chinese mountain streams, where it lives in clear streams and rivers over gravel. Moderate, well-oxygenated current; Appreciates well-oxygenated water.
Not a noted jumper — a standard cover still keeps dust and spray in.
Egg-scatterer; no parental care. Males often slimmer and more colourful.