Argyropelecus sladeni Regan, 1908 .

Hatchetfish or Silvery Hatchetfish. To 6.7 cm (2.6 in) SL (Fujii in Masuda et al. 1984). Circumglobal; western Pacific Ocean north to Japan (Fujii in Masuda et al. 1984); western Bering Sea (Balanov 1992); British Columbia (Gillespie 1993) to Chile (Baird 1971). The distribution of this species is perhaps antitropical (Baird 1971). Depth: 0–1,200 m (3,936 ft) (Roberts et al. 2015). A record in the University of Washington, Burke Museum of Natural History and Culture Fish Collection lists a capture of this species in a midwater trawl fished at greater than 3,000 m (9,840 ft). However, the fish may have entered the trawl at any depth during deployment or retrieval.