科: Cyprinidae
日本䱻为鲤科鱼类，安静的底栖鱼，可能捕食极小鱼，原生分布于日本。成体约 15–30 cm，群游性，建议 6 尾以上，适宜水温 10–24 °C。
Hemibarbus barbus, a member of the family Cyprinidae, comes from Japan, where it inhabits clear streams and rivers over gravel. Calm bottom-dweller; may prey on very small fish and omnivore; prepared foods with regular vegetable matter, it grows to 15–30 cm and adapts well to a properly set-up aquarium in the 10–24 °C range. Other Hemibarbus species in our database include Hemibarbus labeo, Hemibarbus maculatus, Hemibarbus umbrifer.
饲养难度：中等。Calm bottom-dweller; may prey on very small fish。
建议水温 10–24 °C，10–24 °C curated husbandry range；Unheated for temperate species。
成体 15–30 cm 左右，因其Bottom-dwelling的习性，250 L 以上的缸更合适。
Omnivore; prepared foods with regular vegetable matter。建议人工饲料搭配冷冻或活饵，保证多样性。
可以。Calm bottom-dweller; may prey on very small fish，适合与Similar-sized peaceful community fish — Similar size and water needs混养。避开Much smaller fish — May outcompete or bully tiny tankmates。
原生于日本，栖息于Clear streams and rivers over gravel。Moderate, well-oxygenated current，Appreciates well-oxygenated water。
换水与维护期间建议加盖，防止惊跳。
人工环境下：Egg-scatterer; no parental care。Males often slimmer and more colourful。