Gymnocephalus cernua, a small Eurasian freshwater fish.
Other species in the same genus.
Etimologija (Anglų k.)
From Middle English ruff(e), roffe (“a saltwater fish, esp. of the family Sparidae; the freshwater fish Gymnocephalus cernua”), of uncertain origin. Theories include:
* Perhaps an alteration of rough, referring to its scales.
* Perhaps from Latin rufus (“red”), referring to the colour of some Sparidae fish.