Emblemaria piratula, the pirate blenny, is a species of chaenopsid blenny found in coral reefs in the western central Atlantic ocean. It can reach a maximum length of 5cm (02inches) TL. It is also found in the aquarium trade.
References
Ginsburg, I. 1942 (15 Dec.) Seven new American fishes. Journal of the Washington Academy of Sciences v. 32 (no. 12): 364–370.