Rhino Threefin

Trunk without longitudinal stripes; symphyseal dentary pores 1; upper lip with proboscis-like extension on males, head with horizontal yellowish or bluish white line from the upper rim of upper jaw to opercle (Ref. 94457). Males are easily recognized by the extended nose and change color to display to females with an electric blue line below the eye, shaded by black below (Ref. 48636). Also Ref. 94101.

Dorsal spines (total): 17 - 18; Dorsal soft rays (total): 10 - 11; Analspines: 1; Analsoft rays: 20; Vertebrae: 37

Adults inhabit clear coastal reefs with algae covered rocky boulders, usually in small groups (Ref. 48636). They occur in very shallow depths on rock surfaces and under ledges (Ref. 48636). Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114). Minimum depth of 0 m reported from Ref. 58018.

fisheries: of no interest; aquarium: potential

Helcogramma rhinoceros, known commonly as the rhinocerus triplefin or the rhino threefin, is a species of triplefin blenny in the genus Helcogramma. It was described by P.E. Hadley Hansen in 1986. This species is found throughout the Indo-Pacific from Thailand to Fiji and Tonga.