Emblemariopsis occidentalis

Emblemariopsis occidentalis, the Flagfin blenny, Blackfin blenny or the Redspine blenny, is a species of chaenopsid blenny found around the Bahamas, Brazil, and the Lesser Antilles, in the western Atlantic ocean. Males of this species can reach a maximum length of 1.9 centimetres (0.75 in) SL, while females can reach a maximum length of 1.7 centimetres (0.67 in).