Size and habit
A small demersal (bottom-dwelling) freshwater fish.
European Bullhead
Cottus gobio
A small freshwater sculpin found across Europe, mainly in rivers and cold gravelly lakeshores.
miller's thumbfreshwater sculpin
Species Guide
What to know about european bullheads
A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.
The European bullhead (Cottus gobio) is a freshwater fish in the family Cottidae. It is widely distributed in Europe and is mainly found in rivers. This small demersal fish occurs in cold, clear, fast-flowing small streams and in middle-sized rivers, and it also lives on gravelly shores of cold lakes. Additionally, it can thrive in diluted brackish water of the Northern Baltic Sea.
At the country level, the clearest linked starting points on this guide currently point to Switzerland, Germany, Netherlands for divers looking for european bullheads.
Identification
How to identify european bullheads
The visual markers divers can use underwater, plus the species most likely to cause confusion.
Key identification markers
Typical habitats
Found in cold, clear, fast-flowing small streams, middle-sized rivers, and on gravelly shores of cold lakes; also tolerates diluted brackish water.
