Cottus reinii

{{Short description|Species of fish}}

{{Speciesbox

| image = Cottus reinii(Hamamatsu,Shizuoka,Japan).jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Watanabe, K. |author2=Taniguchi, Y. |name-list-style=& |year=2019 |title=Cottus reinii |page=e.T114826701A114826710 |doi=10.2305/IUCN.UK.2019-2.RLTS.T114826701A114826710.en |access-date=22 January 2023}}

| taxon = Cottus reinii

| authority = Hilgendorf, 1879

| synonyms =

}}

Cottus reinii is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. It is endemic to Japan, occurring from Aomori prefecture to Wakayama prefecture in eastern Honshu and Tokushima and Kochi prefectures on Shikoku . It reaches a maximum length of 12.0 cm (4.7 in).{{FishBase |genus= Cottus|species= reinii| month = February | year = 2014}}