Dark Chub

カワムツ

Dark chub is a freshwater fish that can be found in any river of the SatsumaPeninsula.  It has an indigo blue line on its side.

They live in upstream and midstream where the current is relatively mild. They tend to hide behind rocks and other objects. Males are bigger compared to females. Mature males turn vermilion and grow small bumps around its head and anal fin called pearl organ.