The Wrinkled snake-eel (Ophichthus rugifer) is an eel in the family Ophichthidae (worm/snake eels). It was described by David Starr Jordan and Charles Harvey Bollman in 1890. It is a marine, tropical eel which is known from the eastern central and southeastern Pacific Ocean, including the Galapagos Islands and the Cocos Islands. It is also speculated to occur in Malpelo Island. It is known to dwell at a depth of 200 metres (660 ft), and inhabits sediments of sand and rubble. Males can reach a maximum total length of 68 centimetres (27 in).