Tapertail

Body and tail silvery in color; dorsal base blackish (Ref. 6551). Branchiostegal rays: 4-6 (Ref. 36609). Pelvic fins absent in adults.

Oviparous (Ref. 36609).

Dorsal spines (total): 0; Dorsal soft rays (total): 152 - 160; Analspines: 0; Analsoft rays: 6 - 7; Vertebrae: 114 - 121

Mesopelagic species. Adults feed on lantern-fishes (Myctophidae) and possibly euphausiid crustaceans.

Mesopelagic species (Ref. 6808). Adults feed on lantern-fishes (Myctophidae) and possibly euphausiid crustaceans (Ref. 6739). Oviparous, with planktonic larvae (Ref. 36609). They have the ability to discharge dark brown fluid from the ink-sac when alarmed.

The tapertail, Radiicephalus elongatus, is a species of marine fish found in the central and eastern Atlantic and eastern Pacific. This species grows to 76 cm (30 in) in total length. It is the only known species in the genus Radiicephalus and the family Radiicephalidae.