Argyropelecus hemigymnus Cocco, 1829 .

Spurred Hatchetfish. To 4.9 cm (1.9 in) TL or more (Mecklenburg et al. 2018). Circumglobal; western Pacific Ocean north to Japan (Aizawa in Nakabo 2002) and Russian northwestern Pacific (Orlov and Tokranov 2019); Washington (Matarese et al. 1989) to Chile (Baird 1971). Depth: 50–3,065 m (164–10,053 ft) (min.: Mecklenburg et al. 2018; max.: Porteiro et al. 2017).