Genus Nettorhamphos

A clingfish genus that differs from all other genera in this family by having unique features of the oral jaws, including: an upper jaw that is much wider and longer than the lower jaw, creating a large gap between the outermost teeth of the upper jaw and those of the lower jaw (vs. upper and lower jaws similar in width and length and without obvious gap between the outermost teeth of the upper jaw and those of the lower jaw or upper jaw only slightly wider and longer than the lower jaw creating a narrow gap between the outermost teeth of the upper jaw and those of the lower jaw); the presence of tiny dagger-like conical teeth of uniform size arranged in multiple rows in both the upper (premaxilla; ~15 rows) and lower jaw (dentary; ~10 rows; vs. single row of conical teeth along both the upper and lower jaws, a few short, staggered rows of incisiviform and/or conical teeth along both the upper and lower jaw, or conical teeth arranged in a broad patch anteriorly tapering to a single row posteriorly along both the upper and lower jaws). 
Nettorhamphos differs further in having the following combination of characters: medial face of dentary lacking an anteromedially directed spine-like process; snout broad, rounded anteriorly, upper lip separated from snout by a shallow groove; adhesive disc double, papillae present along the entire anterior margin of disc region A; patches of papillae present in disc regions C and D; gill openings large, joined across isthmus; a well-developed spine laterally on head, formed by a heavily ossified subopercle; dorsal and anal fins widely separated from caudal fin; dorsal fin with fewer fin rays than anal fin.
The name Nettorhamphos is derived from a combination of the Greek words netta, meaning duck, and rhamphos, meaning bill, curved-beak.