Specimens examined:5 (SL 220〜320 mm). Depth:790〜850 m.
Counts:D 11〜13; A 13〜15; P1 6〜7; P2 7. OV 33〜35; VAL 14〜16+3〜4=18〜19; IP 10; PV 33〜35; VAN 13〜14+1=14〜15; AC 6〜7+5〜7=12〜13; maxillary teeth 37〜47.
本種は標準体長337mmに達することが知られている(Parin et al., 1977)。本種の和名は大型になる特徴に由来する。(藤井)
Distinctive characters:
(Genus):Teeth on maxillary short, usually more than 30, somewhat closely spaced but never comb-like, curved inwardly. Teeth on premaxillary and dentary short, never fang-like. Anal fin with 12〜17 rays. Dorsal origin slightly posterior to pelvic insertion. Photophres of ventral row arranged in discontinuous, close-set groups of 1〜5. Photophores of lateral row continuous, about equally spaced. (Species):One species, Heterophotus ophistoma.
Distribution:
Tropical to subtropical waters of western and central Atlantic Ocean, Gulf of Mexico, and Caribbean Sea; western North Pacific. Type locality-North Atlantic.
Remarks:
The species is known to become SL 337 mm (Parin et al., 1977). (Fujii)