Cutthroat eels are a family, Synaphobranchidae, of eels, the only members of the suborder Synaphobranchoidei. They are found worldwide in temperate and tropical seas.
The grey cutthroat eel, Synaphobranchus affinis, is a cutthroat eel. It was originally described by Albert Günther in 1877. It lives a benthic lifestyle, inhabiting the continental slope and global deep waters including near Portugal, Canary Islands, Morocco, Japan, Australia, and others. It is a marine, deep water-dwelling eel which has been found at depths ranging from 300 to 2300 meters and at temperatures ranging from 3.3 - 11.3 °C. Males can grow to a length of up to 110 centimeters. It is primarily a scavenger, however it also actively hunts small fish and crustaceans.
Ilyophis is a genus of marine ray-finned fishes belonging to the family Synaphobranchidae, the cutthroat eels. These eels are found in the Atlantic, Indian and Pacific Oceans.
Gnathophis is a genus of marine congrid eels.
Histiobranchus is a genus of eels in the family Synaphobranchidae.
Myroconger is the only genus of eels, the thin eels, in the family Myrocongridae. Very little is known about the group.
Facciolella is a genus of eels in the duckbill eel family Nettastomatidae.
Nettastoma is a genus of eels in the duckbill eel family Nettastomatidae.
Atractodenchelys is a genus of eels in the cutthroat eel family, Synaphobranchidae.
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 from Victoria, Australia, in the eastern Indian Ocean. It is known to dwell at a depth of 164 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.
Nettastoma falcinaris 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. It is known to dwell at a depth range of 1,070 to 1,100 metres. It is deemed harmless to humans.
Atractodenchelys robinsorum is an eel in the family Synaphobranchidae. It was described by Emma Stanislavovna Karmovskaya in 2003. It is a marine, deep water-dwelling eel which is known from the Chesterfield Islands in the southwestern Pacific Ocean. It is known to dwell at a depth of 710 metres.
Ilyophis arx is an eel in the family Synaphobranchidae. It was described by Catherine H. Robins in 1976. It is a marine, deep water-dwelling eel which is known from the eastern Pacific and northeastern Atlantic Ocean. It dwells at a depth range of 1,790 to 3,225 metres. Males can reach a maximum total length of 44.7 centimetres (17.6 in).
Ilyophis blachei is an eel in the family Synaphobranchidae. It was described by Luiz Vieria Caldas Saldanha and Nigel Merrett in 1982. It is a marine, deep water-dwelling eel which is known from the northeastern and southeastern Atlantic and southern Indian Ocean. It dwells at a depth range 580 to 2,070 metres, and inhabits the continental shelf. Males can reach a maximum total length of 79.2 centimetres (31.2 in).
Ilyophis nigeli is an eel in the family Synaphobranchidae. It was described by Yuri Nikolaevich Shcherbachev and Kenneth J. Sulak in 1997. It is a marine, deep water-dwelling eel which is known from Japan, in the northwestern Pacific Ocean. It is known to dwell at a depth range of 700 to 1,800 metres. Males can reach a maximum total length of 51.3 centimetres (20.2 in).
Ilyophis robinsae is an eel in the family Synaphobranchidae. It was described by Yuri Nikolaevich Shcherbachev and Kenneth J. Sulak in 1997. It is a marine, deep water-dwelling eel which is known from the Philippines, in the Indo-West Pacific. It is known to dwell at depths of 4,800 metres (15,700 ft) to 5,180 metres (16,990 ft). Males can reach a maximum total length of 34.8 centimetres (13.7 in).
Coloconger saldanhai is an eel in the family Colocongridae. It was described by J.C. Quéro in 2001. It is a marine eel which is known from New Caledonia.
Ilyophinae, the arrowtooth ells or mustard eels, is a subfamily of marine ray-finned fishes belongiing to the family Synaphobranchidae, the cutthroat eels. Within its family this subfamily shows greatest number of species and the greatest morphological diversity.
