Ophichthus hirritus is an eel in the family Ophichthidae (worm/snake eels). It was described by John E. McCosker in 2010. It is a marine, deep water-dwelling eel which is known from the Seychelles Islands, in the western Indian Ocean. It is known to dwell at a depth of 600 metres (2,000 ft). Males can reach a maximum total length of 52.8 centimetres (20.8 in), while females can reach a maximum TL of 53.4 centimetres (21.0 in). The species epithet "hirritus" means "to snarl like a dog" in Latin, and refers to the eel's facial structure.