Fish of Japan(Nakabo, 2002);
Females with body short, globle; mouth large, cleft extending past eye, oblique or vertical; eye small; illicium short; esca simple, with anterior and posterior crests; anterior margin of vomer nearly straight; upper and lower jaws with numerous slender, recurved and depressible teeth; vomerine teeth present; skin covered with tiny close-set dermal spinules, appearing naked; dark brown to black over entire surface of head, body, fins, and oral cavity; sphenotic spines absent. D 13; A 4; P 16; C 8. Upper jaw teeth 65; lower jaw teeth 60. Illicium length 34.5 in %SL, escal width 3.9, head length 27.6, head depth 45.7, premaxillary length 34.5, lower jaws 34.5, the narrowest distance between front 13.8.
Marine. First dorsal spine of female highly modified into a long rod with a light organ in the tip call illicium and esca, the esca containing bacteria as luminous symbiont, its function in attracting prey. Oviparous, larvae habits in the upper, food-rich
Adults are meso- and bathypelagic from about 250m to bellow 3000m with a wide geographic distribution in tropical and subtropical waters of all three major ocean of the world.