Family: Cyprinidae
A peaceful omnivore cyprinidae from the Korean Peninsula and Japan — moderate care.
A Cyprinidae species native to Japan & the Korean Peninsula: Acheilognathus cyanostigma lives mid-water swimmer; keep 6+ over clear streams, rivers and still waters. Peaceful. Adults reach 4.2–6 cm. It is one of the aquarium-kept Acheilognathus species we profile, alongside Acheilognathus barbatulus, Acheilognathus gracilis, Acheilognathus macropterus.
A moderate-level species: peaceful; stable water matters more than fancy equipment.
Hold 18–26 °C and keep it stable — community-standard range; verify locally. Standard heater to hold the mid-range steadily.
Full size is 4.2–6 cm. Minimum tank: 60 L, with open swimming space along its mid-water swimmer; keep 6+ habits.
Omnivore; quality prepared foods with variety. It forages naturally over smooth gravel and sand with open floor space, so let some food reach the bottom.
Peaceful. Recommended tankmates: Amur False Gudgeon — Similar size and water needs, China-Bitterling — Similar size and water needs, Acanthorhodeus chankaensis — Similar size and water needs. Avoid Large aggressive cichlids — Bullying and injury risk, Known fin nippers — Constant stress and fin damage.
Comes from Japan & the Korean Peninsula: clear streams, rivers and still waters. Expect moderate flow and average oxygen needs.
Spawning; condition with rich foods and simulate seasonal changes. Males are typically slimmer and more intensely colored; females fuller-bodied.