Synaphobranchus affinis Günther, 1877 .

Slope Cutthroat Eel. To 160 cm (63 in) TL (Sulak and Shcherbachev 1997). Circumglobal; western Pacific Ocean north to Russian Western Pacific (Orlov and Tokranov 2019); unknown in eastern North Pacific except for one Bering Sea, Alaska record (Mecklenburg et al. 2002); Hawai’i (Mecklenburg et al. 2002). Depth: 290–2,400 m (951–7,872 ft) (min.: Sulak and Shcherbachev 1997; max. Orlov and Tokranov 2019).