Wikipedia
Schraetzer
The schraetzer (Gymnocephalus schraetser) or striped ruffe, is a species of perch native to the Danube basin. It is a schooling fish, being found over muddy or sandy bottoms of moderately flowing large rivers. This species can reach a length of TL though most only grow to . The greatest recorded weight for this species is . While of no interest to commercial fisheries, it is popular as a game fish and is also frequently used as bait in pursuit of other species.