Common nase Common nase The common nase ("Chondrostoma nasus") is a European potamodromous cyprinid fish. It is often simply called the nase, but that can refer to any species of its genus "Chondrostoma". Another name is sneep. The nase is found naturally in drainages of the Black Sea (Danube, Dniestr, Southern Bug, Dniepr), the southern Baltic Sea (Nieman, Odra, Vistula) and the southern North Sea (to Meuse in the west). Moreover, it has been introduced to the Rhône, Loire, Hérault, and Soca (Italy, Slovenia) drainages. It is a migratory fish. The nase has a spindle shaped physique, with a blue-grey metallic-coloured scales
Common bleak young bleak, though the pointed upward turned mouth of the bleak is already distinctive at young stages. Young roach and ruffe have a wider body and a short anal fin. The bleak occurs in Europe and Western Asia: north of the Caucasus, Pyrenees and Alps, and eastward toward the Volga basin and North-Western Turkey. It is absent from the major southern peninsulas and most of British Isles except southeast England. It is however locally introduced in Spain, Portugal, and Italy. The bleak lives in great schools and feeds upon small molluscs, insects that fall in the water, insect larvae, worms,