Gymnocephalus
| Gymnocephalus | |
|---|---|
| Eurasian ruffe, (G. cernua) | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Percidae |
| Subfamily: | Acerinae Bleeker, 1858 |
| Genus: | Gymnocephalus Bloch, 1793 |
| Type species | |
| Perca schraetser | |
| Synonyms | |
| |
Gymnocephalus is a genus of ray-finned fishes from the family Percidae, which includes the perches, pike-perches and darters. They are from the Western Palearctic area, although one species, Gymnocephalus cernua has been accidentally introduced to the Great Lakes region where it is regarded as an invasive species. They have the common name "ruffe" and resemble the true perches in the genus Perca, but are usually smaller and have a different pattern.
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