(Genus):Body moderately elongate. A single lateral line, curved abruptly downward anteriorly. Spines of anal fin slightly separated from the part of soft rays, the 1st spine shorter than 2nd. Pelvic fin consisting of a single spine, without soft rays. Pelvic spine long in young, reduced with growth. Dorsal and anal fins with fin-lets. Vomer and palatine with teeth. Skin smooth. Abdomen not keeled. Caudal peduncle without lateral keel. (Species):One species, Promethichthys prometheus.
Distribution:
Warm waters of Atlantic, Pacific, and Indian oceans. Type locality‐Saint Helena Island (South Atlantic). (Fujii)