Acromycter atlanticus is an eel in the family Congridae (conger/garden eels). It was described by David G. Smith in 1989. It is a marine, deep water-dwelling eel which is known from the western central Atlantic Ocean (from which its species epithet is derived). It dwells at a depth range of 503-640 metres. Males can reach a maximum total length of 29.5 centimetres.