Threefin blenny to rock crevices at any perceived threat. Threefin blennies are diurnal and territorial; many species exhibit sexual dichromatism, with the females drab compared to the males. The second dorsal fin is also extended in the males of some species. Small invertebrates comprise the bulk of the threefin blenny diet. FishBase lists about 150 species in 30 genera: Threefin blenny Threefin or triplefin blennies are blennioids, small perciform marine fish of the family Tripterygiidae. Found in tropical and temperate waters of the Atlantic, Pacific and Indian Oceans, the family contains about 150 species in 30 genera. The family name derives from
Seaweed blenny Seaweed blenny The seaweed blenny ("Parablennius marmoreus") is a species of combtooth blenny found in coral reefs in the western Atlantic Ocean along the coasts of New York, Bermuda, the Bahamas, also in the Gulf of Mexico, south to southern Brazil. This species reaches a length of TL. The seaweed blenny has a blunt head, a beak-like snout and a long, slender body. It grows to a maximum length of about . The mouth contains about forty comb-like incisors and above the eyes there are tufts of branched cirri (slender, fleshy structures). The gill slits are continuous across the throat.