Author: Linnaeus, 1758
FBname: Bullhead
Remark: Junior synonym <i>Cottus jaxartensis</i> is a valid species according to Sideleva, 2021 (Ref. 129291) and <i>Cottus nudus</i> is a primary homonyn and permanently invalid (include in Ref. 129291 Quote).
Comments: Occurs in cold, clear and fast-flowing water of small stream to medium-sized rivers as well as on gravel or rocky shores of cold lakes and in slightly brackish waters along eastern coast of Baltic coast (Ref. 59043).  Feeds on small bottom invertebrates, mainly insects, crustaceans.  Pink to yellow eggs are found in clumps attached to undersides of large stones (Ref. 41678). Contrary to statements in older literature, eggs and larvae of fishes are not a common food item (Ref. 45167).