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 49 m (161 ft). It can reach a length of 10 cm (3.9 in). The specific name honours the American naturalist, conservationist and author Charles Frederick Holder (1851-1915).

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