Histiobranchus bathybius (Günther, 1877) .

Deepwater Cutthroat Eel. To 137 cm (54 in) TL (Saldanha and Bauchot in Whitehead et al. 1986). Circumglobal; western Pacific Ocean north to Japan and Russian North-western Pacific (Orlov and Tokranov 2019); unknown in eastern North Pacific except for one record from south-eastern Bering Sea, Alaska (Mecklenburg et al. 2002), and one record from off Cabo San Lucas, southern Baja California (Sulak and Shcherbachev 1997). Depth: 295–4,855 m (968–15,928 ft) (min.: Orlov and Tokranov 2019; max.: Saldanha and Bauchot in Whitehead et al. 1986). We classify this species in Histiobranchus following Sulak and Shcherbachev (1997). Histobranchus cf. bathybius was observed in the Clarion-Clipperton Zone (about 12°27.2’N, 116°38.9’W), well south of the Cabo San Lucas record (Amon et al. 2017).