Ruffe

Ruffe
	Ruffe in Pärnu River (Estonia)
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Percidae
Genus:	Gymnocephalus
Species:	G. cernua
Binomial name
	Gymnocephalus cernua; (Linnaeus, 1758)
Synonyms
	Perca cernuus Linnaeus, 1758; Acerina cernua (Linnaeus, 1758); Holocentrus post Lacépède, 1802; Cernua fluviatilis J. Fleming, 1828; Acerina vulgaris G. Cuvier, 1829; Acerina fischeri Eichwald, 1873; Acerina czekanowskii Dybowski, 1874; Acerina cernua danubica Vladykov, 1931 (ambiguous); Acerina cernua essipovi Burmakin, 1941;

The ruffe (Gymnocephalus cernua), also known as the Eurasian ruffe or pope, is a freshwater fish found in temperate regions of Europe and northern Asia. It has been introduced into the Great Lakes of North America, reportedly with unfortunate results, as it is invasive and is reproducing faster than other species. Its common names are ambiguous – "ruffe" may refer to any local member of its genus Gymnocephalus, which as a whole is native to Eurasia.

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