Alloclinus is a genus of blennies in the family Labrisomidae. It is monotypic, being represented by the single species, Alloclinus holderi, commonly known as the island kelpfish. Alloclinus holderi is a subtropical species native to the eastern Pacific Ocean from Santa Cruz Island, California, to Baja California. This species inhabits rocky areas and can be found down to about 49m (161feet). It can reach a length of 10cm (00inches). The specific name honours the American naturalist, conservationist and author Charles Frederick Holder (1851-1915).[1]