Cutthroat eels are a family, Synaphobranchidae, of eels, the only members of the suborder Synaphobranchoidei. They are found worldwide in temperate and tropical seas.
Ilyophis is a genus of eels in the cutthroat eel family Synaphobranchidae.
Gnathophis is a genus of marine congrid eels.
Ariosoma is a genus of marine congrid eels.
Bathycongrus is a genus of eels in the family Congridae.
Atractodenchelys is a genus of eels in the cutthroat eel family, Synaphobranchidae.
Ariosoma ophidiophthalmus is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 1991. It is a tropical, marine eel which is known from the Say de Malha Bank in the western Indian Ocean. It is known to dwell at a depth range of 110–115 metres.
Ariosoma sazonovi is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 2004. It is a marine, deep water-dwelling eel which is known from the Philippines, in the western Pacific Ocean. It is known to dwell at a depth range of 160–440 metres. Females can reach a maximum total length of 39.5 centimetres.
Chiloconger philippinensis is an eel in the family Congridae. It was described by David G. Smith and Emma Stanislavovna Karmovskaya in 2003. It is a tropical, marine eel which is known from the Philippines, in the western central Pacific Ocean. It dwells at a depth range of 186–230 metres. Females can reach a total length of 19 centimetres.
Parabathymyrus karrerae is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 1991. It is a marine, deep water-dwelling eel which is known from Cape Tala and Madagascar, in the western Indian Ocean. It dwells at a depth range of 260–405 metres.
Acromycter longipectoralis is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 2004. It is a marine, deep water-dwelling eel which is known from New Caledonia, in the western Pacific Ocean. It is known to dwell at a depth of 580 metres. Females can reach a total length of 21.7 centimetres.
Bathycongrus parviporus is an eel in the family Congridae. It was described by Emma Stanislavovna Karmovskaya in 2011. It is a tropical, marine eel which is known from the South China Sea and central Vietnam.
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 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 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 melanocoelus 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 western Australia, in the eastern Indian Ocean. It is known to dwell at a depth of 156 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 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.
Facciolella castlei is an eel in the family Nettastomatidae. It was described by Nikolai Vasilyevich Parin and Emma Stanislavovna Karmovskaya in 1985. It is a marine, deep water-dwelling eel which is known from Chile, in the southeastern Pacific Ocean. The type specimen was retrieved from a depth of 230 metres.
Ilyophis saldanhai is an eel in the family Synaphobranchidae. It was described by Emma Stanislavovna Karmovskaya and Nikolai Vasilyevich Parin in 1999, and is the most recently described of the six species in the genus Ilyophis. It is a marine, deep water-dwelling eel which is known from the western central Atlantic Ocean. It is known to dwell at a depth of 3,020 metres (9,910 ft).
