Aspidophoroides olrikii Lütken, 1877 .

Arctic Alligatorfish. To at least 10 cm (3.9 in) TL (Mecklenburg et al. 2016). Nearly circumpolar; Arctic Ocean from eastern Barents Sea and White Sea eastward to Greenland (but not Canada High Arctic Archipelago), south in western Atlantic, to Newfoundland, and south in Pacific through Bering Sea, to northern Gulf of Alaska in Prince William Sound (Mecklenburg et al. 2011) and Chukchi and Beaufort Seas (Forster et al. 2020). Benthic; depth: 3–520 m (10–1,706 ft) (Mecklenburg et al. 2016). A maximum depth of 632 m (2,073 ft) (Coad in Coad and Reist 2018) is without documentation. Sometimes seen spelled olriki, but the original, correct spelling is olrikii . The correct date for the species description is 1877, although sometimes seen as 1876 (Sheiko and Mecklenburg 2004). Recently as Ulcina olrickii but, genetically, very closely related to Aspidophoroides monopterygius (Bloch, 1786), thus validating its inclusion in Aspidophoroides .