Fucomimus mus, known commonly as the Mousey klipfish in South Africa and the United Kingdom, is a species of clinid, and the only species in the genus Fucomimus. It is found around South Africa, in the southeast Atlantic ocean. It was named by J.D.F. Gilchrist and W.W. Thompson in 1908, and can reach a maximum length of 10 centimetres. Blennies in this species feed primarily off of amphipods, isopods, mollusks, and benthic copepods.
