Rutilus heckelii

Rutilus heckelii is a species of freshwater and brackish water ray-finned fish belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related fishes. This species occurs in freshened areas of Black and Azov Seas, entering the river drainages that flow into those seas, as well as in some rivers draining into the Aegean Sea.