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
USS Blenny (SS-324) engaged in evaluating new equipment. "Blenny" was reclassified an Auxiliary Submarine, AGSS-324, c. 1969. She was decommissioned, 7 November 1969 and laid up in the Reserve Fleet. "Blenny" was struck from the Naval Register, 15 August 1973. She was sunk to form part of an artificial reef about fifteen miles (24 km) off the coast of Ocean City, Maryland in June, 1989. "Blenny" received four battle stars for her World War II service and one battle star for Korean War service. USS Blenny (SS-324) USS "Blenny" (SS/AGSS-324), a submarine, was a ship of the United States Navy named for the