Ophichthidae is a family of fish in the order Anguilliformes, commonly known as the snake eels. The term "Ophichthidae" comes from Greek ophis ("serpent") and ichthys ("fish"). Snake eels are also burrowing eels. They are named for their physical appearance, as they have long, cylindrical, snake-like bodies. This family is found worldwide in tropical to warm temperate waters. They inhabit a wide range of habitats, from coastal shallows and even rivers, to depths below 800 m (2,600 ft). Most species are bottom dwellers, hiding in mud or sand to capture their prey of crustaceans and small fish, but some are pelagic.
Cyema is a monospecific genus of marine ray-finned fish belonging to the monotypic family Cyematidae. The only species in the genus is Cyema atrum, the arrow eel, bobtail eel, bobtail snipe eel or deepwater eel. This species has circumglobal distribution.
Gymnothorax is a genus of fish in the family Muraenidae found in Atlantic, Indian, and Pacific Oceans. With more than 120 species, it the most speciose genus of moray eels.
Myroconger is the only genus of eels, the thin eels, in the family Myrocongridae. Very little is known about the group.
Eels are ray-finned fish belonging to the order Anguilliformes, which consists of eight suborders, 20 families, 164 genera, and about 1000 species. Eels undergo considerable development from the early larval stage to the eventual adult stage and are usually predators.
Cryptacanthodes is a genus of marine ray-finned fishes belonging to the monogeneric family Cryptacanthodidae, commonly referred to as wrymouths. Three of the four species are found in the Pacific Ocean with one species native to the western Atlantic Ocean where they are benthic fishes, tunneling through soft substrates. It is currently the only known genus in its family.
Indostomus is a genus of small fishes native to slow moving or stagnant freshwater habitats in Indochina. It is the sole genus of the monogeneric family Indostomidae, Long considered to be sticklebacks, within the order Gasterosteiformes, modern analyses place the Indostomids within the order Synbranchiformes, related to the spiny eels and swamp eels.
Dysomma 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.
Barathronus is a genus of deep-sea fish that are placed in the family Aphyonidae or family Bythitidae (brotulas), depending on the source.
Coloconger cadenati is an eel in the family Colocongridae. It was described by Robert H. Kanazawa in 1961. It is a marine, deep-water dwelling eel which is known from Senegal to the Gulf of Guinea in the eastern Atlantic Ocean. It is known from a depth range of 270–600 m. Males can reach a maximum total length of 90 cm. The diet of C. cadenati consists primarily of benthic crustaceans.
Coloconger canina is an eel in the family Colocongridae. It was described by Peter Henry John Castle and Solomon N. Raju in 1975. It is a marine, deep-water dwelling eel which is known from leptocephali collected from the Indian Ocean. It is known to dwell at a minimum depth of 300 m.
Coloconger eximia is an eel in the family Colocongridae. It was described by Peter Henry John Castle in 1967, originally under the genus Ascomana. It is a marine, deep-water dwelling eel which is known from Cape Peninsula, South Africa, in the southeastern Atlantic Ocean.
Coloconger japonicus is a species of eels in the family Colocongridae. It was described by Yoshihiko Machida in 1984. It is a marine, deep-water dwelling eel which is known from the East China Sea. It dwells at a depth range of 750–760 metres. Males can reach a maximum total length of 56 centimetres.
Coloconger meadi is an eel in the family Colocongridae. It was described by Robert H. Kanazawa in 1957. It is a marine, deep-water dwelling eel from the Gulf of Mexico and Suriname in the western central Atlantic Ocean. It dwells at a depth range of 650–925 m. Males can reach a maximum total length of 37.7 cm.
The froghead eel is an eel in the family Colocongridae. It was described by Alfred William Alcock in 1889. It is a marine, deep-water dwelling eel which is known from the Indo-west Pacific, including East Africa, Madagascar, and southern Japan. It dwells at a depth range of 300–1134 metres. Males can reach a maximum total length of 50 centimetres.
The Indo-Pacific shorttail conger, also known as the short-tail conger, is an eel in the family Colocongridae. It was described by Chan William Lai-Yee in 1967. It is a marine, deep-water dwelling eel which is known from the Indo-Pacific, including southern Mozambique, Natal, South Africa, the South China Sea, and eastern Australia. It dwells at a maximum depth of 810 metres (2,660 ft). Males are known to reach a maximum total length of 51 centimetres (20 in).
Myrophinae, the worm eels, is a subfamily of ray-finned fishes belonging to the family Ophichthidae, which also includes the snake eels in the subfamily Ophichthinae.
Congroidei is a suborder of ray-finned fishes belonging to the order Anguilliformes, the eels. These eels are mostly marine, although a few species of snake eel will enter freshwater, and they are found in tropical and tempareate waters throughout the world.
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.
Gymnelinae is a subfamily of marine ray-finned fish belonging to the family Zoarcidae, the eelpouts. Most species are found in the North Pacific Ocean but one genus is cosmopolitan, and another is endemic to the Southern Ocean.
