hexapterus, occurred together in the area around Wakkanai in the Soya Strait off northeastern Hokkaido.
On the basis of material examined, we determined that Ammodytes hexapterus ranges from the Soya Strait off Wakkanai, Hokkaido, Japan, through the Sea of Okhotsk, the western and northeastern Bering Sea, and into the Chukchi Sea (Fig.
japonicus in the Soya Strait off Wakkanai, Hokkaido (Fig.
hexapterus) found in Japan only in Soya Strait; a northcentral group ("II";=A.
hexapterus, ranging from the Hudson Bay in the east, through the Chukchi and Bering seas, to the western Pacific region in the Sea of Okhotsk and to Soya Strait between Hokkaido and Sakhalin islands; A.
were found together in our Soya Strait material; data from other authors strongly indicate that the latter 2 species are also found together in the Sea of Japan (Hashimoto, 1984; Kim et al., 2006, 2008, 2010; Han et al., 2012).
Ammodytes hexapterus exhibits an Arctic-Kuril distribution (Allen and Smith, 1988; Briggs, 1995; Logerwell et al., 2005), extending from the southern Sea of Okhotsk in the Soya Strait to the western Bering Sea, the northeastern Bering Sea, and into the Chukchi Sea.