Rhodeus amarus
Journal: Open MIND
Year: 2025

Rhodeus amarus Common name. Bitterling. Diagnosis. Distinguished from R. colchicus by: ● second infraorbital bone narrow ● 35−38, usually 36−37, total vertebrae / ● 34−41, usually 36−40, scales in lateral series. No morphological character known to distinguish from R. caspius. Size up to 95 mm SL. Distribution. Marmara and Black Sea basins (except easternmost) and all rivers draining into Aegean south to Büyük Menderes. Very widespread and invasive in Europe, where it is native in northern Aegea