Lake minnow
(Rhynchocypris percnurus)
Image source: Jo's Animal Database
The lake minnow or swamp minnow (Rhynchocypris percnurus) is a Eurasian species of small freshwater cyprinid fish. It has a wide but disjunct distribution including parts of Europe (Belarus, Czech Republic, Germany, Lithuania, Poland, Russia, and Ukraine) and Asia (northern China, Japan, Korea, and Siberia).
Individuals in this species can grow up to 18.5 cm.
Widespread but highly disjunct range: lakes in Odra, Vistula, Dniepr, Volga (Oka and Kama systems) drainages, isolated localities in Middle Volga, lakes in Arctic Ocean (from Nothern Dvina to Kolyma drainages) and Pacific basins (from Amur to Korea and Japan).
Can be separated from Rhynchocypris czekanowskii by having male genital papilla not long and pointed, and body depth greater than or equal to caudal peduncle length.
