Figure 1 from Morphology of the Genus Gymnocephalus (Pisces) from the Lower Danube River | Semantic Scholar
Gymnocephalus - Wikipedia
Balon's Ruffe, Danube Ruffe (Gymnocephalus baloni), swimming, Stock Photo, Picture And Rights Managed Image. Pic. BWI-BS419063 | agefotostock
Balon's Ruffe, Danube Ruffe (Gymnocephalus baloni), swimming at a gravel ground, Stock Photo, Picture And Rights Managed Image. Pic. BWI-BS295484 | agefotostock
Gymnocephalus baloni Stock Photos and Images | agefotostock
Freshwater fish isolated on white background closeup. Balon's ruffe, also known as the Danube ruffe is a species of perch, type species: Gymnocephalus baloni. - Buy this stock photo and explore similar