[2] It was described by David G. Smith and James Erwin Böhlke in 1981.

[3] It is a marine, deep water-dwelling eel which is known from a single specimen discovered near North Bimini Marine Protected Area in 1964.

It is known to dwell at a depth range of 458 to 531 meters (1,503 to 1,742 ft).

Males can reach a total length of 42.3 centimeters (16.7 in).

[2] The species epithet "inion" means "back of head" in Greek, and is treated as a noun in apposition.