Heteroconger obscurus, the obscure garden eel, is an eel in the family Congridae (conger/garden eels). It was described by Wolfgang Klausewitz and Irenäus Eibl-Eibesfeldt in 1959, originally under the genus Xarifania. It is a marine, tropical eel which is known from the eastern Indian Ocean, including the Nicobar Islands in India, and Andaman Island. It is known to dwell at a maximum depth of , and inhabits silty sediments. Males can reach a maximum total length of .