Ichthyococcus elongatus Imai, 1941 .

Slim Lightfish. To 14 cm (5.5 in) SL (Balanov et al. 2009). Western Pacific Ocean north to Japan (Fujii in Masuda et al. 1984) and southern Kuril Islands (Parin et al. 1995); near Vancouver Island, British Columbia (Peden and Hughes 1986) to southern Baja California (Berry and Perkins 1966). Mesopelagic (Fujii in Masuda et al. 1984); depth: 100–1,948 m (328–6,389 ft) (Kamikawa 2017). A record of a possible maximum depth of 5,488 m (18,000 ft) (Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California) was based on the maximum depth fished by a midwater trawl and may represent a catch shallower than the maximum depth.