[2] It was described by Emma Stanislavovna Karmovskaya in 2009.

[3] It is a tropical, marine eel which is known from the southern Loyalty Basin in New Caledonia.

It usually dwells at a depth range of 430–450 metres.

Males can reach a maximum total length of 28.3 centimetres.

[2] The species epithet "unimaculatus" means "one spot" in Latin, and refers to a large dark spot on the anal fin of the eel.