| Japanese fluvial sculpin | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Division: | Teleostei |
| Order: | Perciformes |
| Suborder: | Cottoidei |
| Family: | Cottidae |
| Genus: | Cottus |
| Species: | C. pollux |
| Binomial name | |
| Cottus pollux Günther, 1873 | |
The Japanese fluvial sculpin (Cottus pollux) is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. It is endemic to Japan, where it inhabits mountain streams in Honshu, Shikoku, and Kyushu. It reaches a maximum length of 15.0 cm (5.9 in). It is also known as the Japanese bullhead.