Sailfin Blenny

Sailfin Blenny, Female

A female Sailfin Blenny has a much smaller dorsal fin compared to a male.

This Blenny has a tall, sail-like front dorsal fin that stays folded when at rest. It has a rounded head, a short snout, and a single long, banded cirrus above its eye. Males are typically dark brown with black snouts but can turn pale when disturbed. Females are light tan with scattered pale spots and darker blotches and have smaller dorsal fins compared to males.

The Sailfin Blenny lives in small groups in sandy and rocky areas. It stays inside its hole with only its head visible. Males jump from their shelter and raise and lower their large dorsal fin, most often in the late afternoon. It quickly retreats when disturbed but can be observed if approached carefully.