Smiling snake eel

The smiling snake eel is an eel in the family Ophichthidae. It was described by David Starr Jordan and Charles Henry Gilbert in 1882, originally under the genus Apterichthys. It is a marine, tropical eel which is known from the eastern central and southeastern Pacific Ocean, including Colombia, Costa Rica, Panama, Ecuador, and Mexico. It dwells at a maximum depth of, and inhabits sediments of sand. Males can reach a maximum total length of.
Due to its wide distribution, lack of known threats, and lack of observed population decline, the IUCN redlist currently lists the Smiling snake-eel as Least Concern.