Editing Ruffe (section)

==Description==
The ruffe's colors and markings are similar to those of the [[walleye]], an olive-brown to golden-brown color on its back, paler on the sides with yellowish white undersides. The ruffe can reach up to {{cvt|25|cm|in}} in length,<ref>{{cite web |title=Invasive Species: Eurasian Ruffe |url=https://www.michigan.gov/invasives/id-report/fish/eurasian-ruffe |website=Michigan Invasive Species |publisher=Michigan State Government |access-date=19 November 2023}}</ref> but is usually around half that size.<ref name=fishbase>{{FishBase | genus = Gymnocephalus | species = cernua  | month = August | year = 2016}}</ref> It is a very aggressive fish for its size. The ruffe also has a large, spiny [[dorsal fin]] which is likely distasteful to its [[predator]]s. It also has two fins on top, the front fin has hard and sharp spines, the back fin has soft spines called rays. The most obvious features to recognize a ruffe are the ruffe's large, continuous dorsal fin and its slightly downturned mouth.