Gnathophis is a genus of marine congrid eels.
The Gilbert's garden eel, also known as the Gilbert's conger and the sharpnose conger, is an eel in the family Congridae. It was described by James Douglas Ogilby in 1898, originally under the genus Congrellus. It is a tropical, marine eel which is known from the eastern central and southeastern Pacific Ocean, including the Gulf of California, Costa Rica, El Salvador, Ecuador, Guatemala, Mexico, Honduras, Nicaragua, Panama, and Colombia. It is a benthic and nocturnal species, and inhabits sand flats in reefs, bays and coves at a depth range of 1–100 metres. It burrows into sand during the day and emerges to forage during the night. Males can reach a maximum total length of 27 centimetres.
Gnathophis bathytopos, the blackgut conger, is an eel in the family Congridae. It was described by David G. Smith and Robert H. Kanazawa in 1977. It is a marine, deep water-dwelling eel which is known from the Straits of Florida, USA, and the southeastern Gulf of Mexico, in the western Atlantic Ocean. It dwells at a depth range of 180–370 meters. Males can reach a maximum total length of 35 cm.
Gnathophis bracheatopos, the longeye conger, is an eel in the family Congridae. It was described by David G. Smith and Robert H. Kanazawa in 1977. It is a tropical, marine eel which is known from the United States and the eastern Gulf of Mexico, in the western Atlantic Ocean. It dwells at a depth range of 55–110 meters. Males can reach a maximum total length of 35 centimeters.
Gnathophis capensis, the Southern Atlantic conger or southern conger, is an eel in the family Congridae. It was described by Johann Jakob Kaup in 1856, originally under the genus Leptocephalus. It is a subtropical, marine eel which is known from the southeastern Atlantic Ocean, including from False Bay to Plettenberg Bay, South Africa and also on Tristan da Cunha Island. It is known to dwell at a depth of 100 metres. Males can reach a maximum total length of 37 cm.
Gnathophis castlei, or Castle's conger, is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya and John Richard Paxton in 2000. It is a marine, deep water-dwelling eel which is known from Queensland, Australia, in the western central Pacific Ocean. It dwells at a depth range of 131–366 metres. Males can reach a total length of 34.2 centimetres.
Gnathophis cinctus, the hardtail conger or Catalina conger, is an eel in the family Congridae. It was described by Samuel Garman in 1899, originally under the genus Atopichthys. It is a tropical, marine eel which is known from the eastern central and southeastern Pacific Ocean, including Chile, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru, and the United States. It dwells at a depth range of 9–336 metres, and leads a benthic lifestyle, burrowing into loose sand. Males can reach a maximum total length of 42 cm.
Gnathophis codoniphorus is an eel in the family Congridae. It was described by Günther Maul in 1972. It is a marine, deep water-dwelling eel which is known from the Azorean slope at the Great Meteor Seamount, in the northeastern Atlantic Ocean. It dwells at a depth range of 300–304 metres (984–997 ft).
Gnathophis grahami, or Graham's conger, is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya and John Richard Paxton in 2000. It is a subtropical, marine eel which is known from New South Wales, Australia, in the southwestern Pacific Ocean. It dwells at a depth range of 50–350 metres.
Gnathophis heterognathos is an eel in the family Congridae. It was described by Pieter Bleeker in 1858, originally under the genus Myrophis. It is a marine, temperate water-dwelling eel which is known from the western Pacific Ocean, including the southwestern Japanese Archipelago, the Philippines, and the South China Sea. It dwells at a depth range of 183–199 metres. Males can reach a maximum total length of 41.5 centimetres.
Gnathophis heterolinea is an eel in the family Congridae. It was described by Adolf Kotthaus in 1968, originally under the genus Lemkea. It is a tropical, marine eel which is known from Mombasa, Kenya, in the western Indian Ocean. It dwells at a depth range of 177–243 metres.
Gnathophis leptosomatus is an eel in the family Congridae. It was described by Christine Karrer in 1983. It is a marine, deep water-dwelling eel which is known from Madagascar, in the western Indian Ocean. It dwells at a depth range of 420–428 metres.
Gnathophis macroporis, the largepore conger, is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya and John Richard Paxton in 2000. It is a marine, temperate water-dwelling eel which is known from Victoria, Australia, in the eastern Indian Ocean. It is known to dwell at a depth of 164 metres.
Gnathophis microps, the smalleye conger, is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya and John Richard Paxton in 2000. It is a marine, deep water-dwelling eel which is known from western Australia, in the eastern Indian Ocean. It dwells at a depth range of 200–320 metres.
Gnathophis mystax, the thinlip conger or blacktailed conger, is an eel in the family Congridae. It was described by François Étienne Delaroche in 1809, originally under the genus Muraena. It is a subtropical, marine eel which is known from the eastern Atlantic Ocean, including southern Portugal, the Mediterranean, and Morocco. It dwells at a depth range of 75–800 metres, and inhabits mud and sand on the continental slope. Males can reach a maximum total length of 60 centimetres, but more commonly reach a TL of 35 centimetres.
Gnathophis nasutus is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya and John Richard Paxton in 2000. It is a tropical, marine eel which is known from western Australia, in the eastern Indian Ocean. It dwells at a depth range of 80–140 metres.
Gnathophis nystromi is an eel in the family Congridae. It was described by David Starr Jordan and John Otterbein Snyder in 1901, originally under the genus Leptocephalus. It contains two subspecies, Gnathophis nystromi nystromi, and Gnathophis nystromi ginanago, which was described by Hirotoshi Asano in 1958, originally under the genus Rhynchocymba.
Gnathophis parini is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 1990. It is a marine, deep water-dwelling eel which is known from the Sala y Gomez Ridge, in the southeastern Pacific Ocean. It dwells at a depth range of 540–560 metres. The maximum known total length, based on a juvenile specimen, is 13.7 centimetres.
Gnathophis smithi is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 1990. It is a subtropical, marine eel which is known from the Nazca and Sala y Gómez ridges, in the southeastern Pacific Ocean. It dwells at a depth range of 145–250 metres, and leads a nocturnal lifestyle. Males can reach a maximum total length of 41.1 centimetres. The eel's diet includes benthic crustaceans and polychaetes.
Gnathophis xenica is an eel in the family Congridae. It was described by Kiyomatsu Matsubara and Akira Ochiai in 1951, originally as a subspecies of Arisoma nystromi. It is a marine, temperate water-dwelling eel which is known from Japan, in the northwestern Pacific Ocean. Males can reach a maximum total length of 32 centimeters.
