The Bullhead (Cottus gobio) is a brackish-water fish of the family Cottidae that grows up to 18 cm.
Description
The European bullhead is a small bottom fish of the family Cottidae reaching about 18 cm but usually smaller. It has a large, broad, flattened head, scaleless skin, broad pectoral fins and a spine on the gill cover; the brownish mottled body provides excellent camouflage among stones. Lacking a swim bladder, it rests on the bottom and moves in short hops. It lives in cool, fast-flowing, oxygen-rich streams and rivers with a stony or gravelly bottom in Europe and is regarded as an indicator of clean water. By day it shelters under stones; at night it hunts insect larvae, crustaceans and fish eggs. In spring the male guards the eggs laid under a stone.
Frequently asked questions
How do you recognise the Bullhead?
The Bullhead has a torpedo-shaped body, is mainly brown and shows a marbled pattern.
Where does the Bullhead live?
The Bullhead lives in brackish water and is mostly found around sand or mud bottom.
How big does the Bullhead get?
The Bullhead grows to a maximum of about 18 cm. On average the species is around 10 cm.
Is the Bullhead dangerous to humans?
No, the Bullhead is harmless to humans.
Is the Bullhead edible?
The Bullhead is not usually eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Cottus
More from the family Cottidae
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