(Genus):Eyes large with a large cresent of whitish tissue on posterior half of iris. Patches of luminous tissue at base of anal fin. Three Prc. PLO, SAO3, Pol2, and Prc3 just above or close to lateral line. Pectoral fin long, extending beyond origin of anal fin. Five VO, the 2nd elevated. PO4 highly elevated. Caudal luminous gland (SUGL and INGL) present. Horseshoe-like lateral line organ absent. (Species):VLO well below lateral line. Vn at anterior aspect of orbit, its size slightly smaller than body photophore. Two Pol.
Distribution:
Tropical to subtropical waters of three major oceans. Type locality-western North Atlantic.
Remarks:
The genus includes 6 species, 3 or 4 of which are known from the tropical Atlantic. (Fujii)