13903 Callechelys eristigma McCosker & Rosenblatt, 1972 Ophichthidae Snake eels Ophichthinae Anguilliformes Teleostei Spotted ridgefin eel Eastern Central Pacific: Gulf of California to the Gulf of Chiriqui, Panama, and Cocos Island. FB 2737140 Callechelys eristigmus 20 - 25 m