The ruffe or Eurasian ruffe (Gymnocephalus cernuus) is a widespread freshwater fish in Eurasia and introduced to North America.
Ruffe may also refer to: Any fish of the genus Gymnocephalus New Zealand ruffe, Schedophilus huttoni Tasmanian ruffe, Tubbia tasmanica Sea ruffe, Any fish of the genus Sebastiscus Sea ruffe, Sebasticus marmarotus