Sailfin Blenny (Atlantic)

Blennies are diminutive fish typically with elongated bodies, and as such we do not recommend any aggressive or large-mouthed fish to be kept with them; this includes all groupers, snappers, sweetlips, soapfish, lionfish, eels, goatfish, anglers/frogfish, leaf fish, and any other fish who may eat them.

The Atlantic Sailfin blenny is an amazing little fish from the Caribbean. Its best feature is its huge dorsal fin which is even larger than its body. It is a dark chocolate color all over, with many darker spots over its entire body and fins. Males and females are visually identical. It grows up to 2 inches.

The Atlantic Sailfin blenny spends most of its time in or on the rocks, always alert and watching its environment. It would appreciate an aquarium with plenty of live rock to make territories in. It is full of personality and appears to watch and interact with its owner through the glass. It will protect its territory from other fish by giving a threat display involving gaping its mouth and spreading its huge dorsal fin to make itself appear much larger than it really is.

Diet should include plenty of high quality meaty items, marine algae, Spirulina, and frozen Mysis shrimp. It is preferable to feed more than once a day. We recommend an aquarium of at least 10 gallons or larger for a single individual. If several Atlantic Sailfin blennies are to be kept together the aquarium should be of sufficient size, contain many hiding places, and all specimens should be added at the same time.