Callechelys bilinearis, the twostripe snake eel, is an eel in the family Ophichthidae (worm and snake eels). It was described by Robert H. Kanazawa in 1952. It is a marine, tropical eel which is known from the western and southeastern Atlantic Ocean, including Bermuda, the West Indies, Lesser Antilles, St. Helena Island and Ascension Island. It dwells at a depth range of , most often at around . Males can reach a maximum total length of .
The species epithet "bilinearis", treated as an adjective, means "two-lined" in Latin, and refers to the pair of stripes along the length of the eel's body.