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 Aptocyclus ventricosus (Pallas, 1769) . Smooth Lumpsucker . To 45 cm ( 17.7 in ) TL ( Solomatov and Orlov 2018 ). Japan and Okhotsk Seas to Providence Bay, Gulf of Anadyr; northern Bering Sea, Alaska to North Pacific Ocean south of Aleutian Islands and Gulf of Alaska to Mathieson Channel, British Columbia (Mecklenburg et al. 2002). Pelagic; depth: usually found in deep waters from near surface to at least 940 m ( 3,083 ft ) ( Solomatov and Orlov 2018 ). Also taken in a bottom trawl towed at 1,556 m ( 5,104 ft ) ( Hoff and Britt 2003 ), but the fish may have entered the net above the bottom; also listed to depth of 1,700 m ( 5,576 ft ) in Federov et al. (2003) . Kido and Shinohara (1996) showed that the species named Pelagocyclus vitiazi Lindberg & Legeza, 1955 is the juvenile stage of A. ventricosus . Genetic data recently presented by Okazaki et al. (2020) indicates that this species may consist of distinct eastern and western populations.