Editing Ruffe (section)

{{Short description|Species of fish}}
{{Distinguish|Ruff (disambiguation){{!}}Ruff}}
{{For|other fishes|List of organisms with the common name Ruffe}}
{{Multiple issues|
{{more citations needed|date=January 2016}}
{{lead too short|date=April 2013}}
{{More footnotes|date=April 2009}}
}}
{{EngvarB|date=June 2022}}
{{Use dmy dates|date=June 2022}}
{{Speciesbox
| image = Gymnocephalus cernuus Pärnu River Estonia 2010-01-06.jpg
| image_caption  = Ruffe in [[Pärnu (river)|Pärnu River]] (Estonia)
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name="iucn">{{cite iucn |author=Freyhof, J. |year=2024 |title=''Gymnocephalus cernua'' |volume=2024 |page=e.T9568A135087494 |doi=10.2305/IUCN.UK.2024-2.RLTS.T9568A135087494.en |access-date=16 March 2025}}</ref>
| taxon = Gymnocephalus cernua
| authority = ([[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]])
| synonyms =
* ''Perca cernuus'' <small>Linnaeus, 1758</small>
* ''Acerina cernua'' <small>(Linnaeus, 1758)</small>
* ''Holocentrus post'' <small>Lacépède, 1802</small>
* ''Cernua fluviatilis'' <small>J. Fleming, 1828</small>
* ''Acerina vulgaris'' <small>G. Cuvier, 1829</small>
* ''Acerina fischeri'' <small>Eichwald, 1873</small>
* ''Acerina czekanowskii'' <small>Dybowski, 1874</small>
* ''Acerina cernua danubica'' <small>Vladykov, 1931</small> (ambiguous)
* ''Acerina cernua essipovi'' <small>Burmakin, 1941</small>
}}

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]].<ref name=fishbase/> It has been [[introduced species|introduced]] into the [[Great Lakes (North America)|Great Lakes]] of [[North America]] as an [[invasive species]] and is causing unfortunate results as it 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]].<ref>{{Cite web|title = Invasive Species: Aquatic Species – Eurasian Ruffe (''Gymnocephalus cernuus'')|url = https://www.invasivespeciesinfo.gov/aquatic/fish-and-other-vertebrates/eurasian-ruffe |website = www.invasivespeciesinfo.gov|access-date = 2016-02-11|publisher = National Invasive Species Information Center}}</ref>