Physical 

They are characterized by elongated, tapering bodies and a continuous long dorsal fin. They have stripes running horizontally along their sides. Males are bluish in color while females are pale green.

Habitat

Blennies are commonly found among oyster beds and hard  bottoms. During winter months, they will go towards deeper waters about 100ft. The Atlantic species can be found as far north as New York.

Feeding 

Blennies feed primarily during the day. They feed on anything half their size in their habitat. They also feed on oysters, clams, and mussels.