Balon's ruffe (Gymnocephalus baloni)

General data
- Main name: Balon's ruffe
- Climates: Temperate, Continental
- Habitat: Freshwater
- Native: Europe
- Distribution: Danube, Dnieper
Classification
- Genus: Gymnocephalus - Ruffies
- Family: Percidae - Perches
- Order: Perciformes - Perches
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes