Checklist of marine and estuarine fishes from the Alaska-Yukon Border, Beaufort Sea, to Cabo San Lucas, Mexico Author Love, Milton S. 0000-0003-0981-0061 love@lifesci.ucsb.edu Author Bizzarro, Joseph J. 0000-0002-2412-9357 joe.bizzarro@noaa.gov Author Cornthwaite, Maria 0000-0002-1528-3272 maria.cornthwaite@dfo-mpo.gc.ca Author Frable, Benjamin W. 0000-0003-4525-0671 bfrable@ucsd.edu Author Maslenikov, Katherine P. 0000-0003-0981-0061 love@lifesci.ucsb.edu text Zootaxa 2021 2021-10-19 5053 1 1 285 journal article 2792 10.11646/zootaxa.5053.1.1 75ffcff3-6336-4f6a-8d0b-94c082519099 1175-5326 5578008 295D03A4-589A-4E3F-B030-5121EF7D7398 Aspidophoroides monopterygius (Bloch, 1786) . Alligatorfish . To 22 cm ( 8.7 in ) TL ( Mecklenburg et al. 2016 ). Atlantic and Pacific Oceans; Seas of Japan and Okhotsk to Gulf of Anadyr, to Bering Sea, and Aleutian Islands, to Chukchi Sea, and Beaufort Sea eastward (to about 71°20’N , 151°06’W ), and to Prince William Sound, Gulf of Alaska ( Mecklenburg et al. 2016 ). Benthic; depth: 8–340 m ( 26–1,115 ft ) (min.: Mecklenburg et al. 2002; max.: Mecklenburg et al. 2018 ). A maximum depth of 500 m ( 1,640 ft ) reported in Mecklenburg et al. (2002) cannot be verified and a record of 695 m ( 2,280 ft ) (Coad in Coad and Reist 2018 ) is without documentation. While we consider Aspidophorides bartoni Gilbert, 1896 to be a junior synonym ( Mecklenburg et al. 2018 ), some authors consider it a valid species (e.g., Tohkairin et al. 2015 ).