any blennioid fish of the family Blenniidae of coastal waters, esp of the genus Blennius, having a tapering scaleless body, a long dorsal fin, and long raylike pelvic fins
2.
any of various related fishes
Word origin
C18: from Latin blennius, from Greek blennos slime; from the mucus that coats its body
Examples of 'blennies' in a sentence
blennies
And many fish — blennies, flounders, seahorses — can rotate their eyes independently of each other, like chameleons.