Cottus (fish)

Cottus is a genus of the mainly freshwater ray-finned fishes belonging to the familyCottidae, the typical sculpins. They are often referred to as the "freshwater sculpins", as they are the principal genus of sculpins to be found in fresh water. They are native to the Palearctic and Nearctic.

They are small fish, mostly less than 15 cm (6 in) in length, although a few species can reach twice that size.