Malacoctenus gilli, the dusky blenny, is a species of labrisomid blenny native to the Atlantic Ocean including the Gulf of Mexico and the Caribbean Sea from the Bahamas to the north coast of South America.
This species inhabits reef patches, areas of sandy substrates with available rocks and beds of seagrass at depths of from 1mto5mm (03feetto16feetm). It can reach a length of 7.6cm (03inches) TL. The person honoured in the patronym of this species was not identified by Steindachner but it is most probably the American ichthyologist Theodore Nicholas Gill (1837-1914), the authority for the generic name Malacoctenus.[1]