Editing Ruffe (section)

==Distribution==
The species occurs in the basins of the [[Caspian Sea|Caspian]], [[Black Sea|Black]], [[Aral Sea|Aral]], [[Baltic Sea|Baltic]] and [[North Sea]], and is also found in [[Great Britain]], parts of [[Scandinavia]]<ref>{{cite journal |last1=Kålås |first1=Steinar |title=The ecology of ruffe, ''Gymnocephalus cernuus'' (Pisces: Percidae) introduced to Mildevatn, western Norway |journal=Environmental Biology of Fishes |date=1 March 1995 |volume=42 |issue=3 |pages=219–232 |doi=10.1007/BF00004915 |bibcode=1995EnvBF..42..219K |s2cid=20474424 |url=https://link.springer.com/article/10.1007/BF00004915 |access-date=11 February 2023 |language=en |issn=1573-5133|url-access=subscription }}</ref> and some regions of the Arctic Ocean basin eastward to the drainage of the [[Kolyma]]. It has been introduced to parts of Western Europe (France, northern Italy) and Greece, as well as to the North American [[Great Lakes]].<ref name="iucn" />