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. Stock Photo | Adobe Stock
Balon's Ruffe, Danube Ruffe (Gymnocephalus baloni), swimming at a gravel ground, Stock Photo, Picture And Rights Managed Image. Pic. BWI-BS295484 | agefotostock
Gymnocephalus - Wikipedia
Gymnocephalus baloni Grbasti okun
Gymnocephalus cernua | Gymnocephalus cernua - Grémille - Ruf… | Gilles San Martin | Flickr
Morphometric characters taken on the ruffe species (picture of... | Download Scientific Diagram