Xyrias is a genus of eels in the snake eel family Ophichthidae. It currently contains the following species:
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.
Uroconger drachi is an eel in the family Congridae. It was described by Jacques Blache and Marie-Louise Bauchot in 1976. It is a marine, tropical eel which is known from a single specimen taken from Pointe Noire, Republic of the Congo, in the eastern Atlantic Ocean. From the holotype it is known to dwell at a depth of 120 metres (390 ft). Males can reach a total length of 41.5 centimetres (16.3 in).
Gorgasia inferomaculata is an eel in the family Congridae. It was described by Jacques Blache in 1977. It is a non-migratory marine, tropical eel which is known from the Gulf of Guinea, in the eastern central Atlantic Ocean.
Pseudomyrophis atlanticus is an eel in the family Ophichthidae. It was described by Jacques Blache in 1975. It is a marine, tropical eel which is known from the eastern Atlantic Ocean, including Senegal and Angola. It dwells at a depth range of 40 to 100 metres, and inhabits the continental shelf, where it forms burrows in sand and mud. Males can reach a maximum total length of 25.9 centimetres (10.2 in).
Bascanichthys ceciliae is an eel in the family Ophichthidae. It was described by Jacques Blache and Jean Cadenat in 1971. It is a tropical, marine eel which is known from the eastern coastal Atlantic Ocean between Senegal and Angola. It inhabits shallow waters where it burrows in sand; the burrows are sometimes exposed during low tide. It can reach a maximum total length of 82.5 centimetres, but more commonly reaches a TL of 60 cm.
Bascanichthys congoensis is an eel in the family Ophichthidae. It was described by Jacques Blache and Jean Cadenat in 1971. It is a tropical, marine eel which is known solely from Pointe Noire, Democratic Republic of Congo, in the eastern Atlantic Ocean. It inhabits bays, where it burrows in mud and sand. Males can reach a maximum total length of 62.3 centimetres.
Brachysomophis atlanticus is an eel in the family Ophichthidae. It was described by Jacques Blache and Luiz Vieria Caldas Saldanha in 1972. It is a tropical, marine eel which is known from the eastern Atlantic Ocean, including Senegal and the Gulf of Guinea. It inhabits the continental shelf, and makes burrows in sand and mud. Males can reach a maximum total length of 27.3 centimetres.
The Shorttail snake eel is an eel in the family Ophichthidae. It was described by Balthazar Osório in 1893, originally under the genus Ophichthys. It is a marine, tropical eel which is known from the western and eastern Atlantic Ocean, including Florida, USA, Puerto Rico, Venezuela, the Bahamas, St. Barthelemy, Senegal, Lesser Antilles, and Cape Verde. It dwells at a depth range of 4 to 35 metres, and inhabits the continental shelf, where it forms burrows in sand and mud. Males can reach a maximum total length of 108 centimetres (43 in).
Callechelys leucoptera is an eel in the family Ophichthidae. It was described by Jean Cadenat in 1954. It is a tropical, marine eel which is known from the eastern Atlantic Ocean, including Senegal to Côte d'Ivoire. It is known to dwell at a depth of 45 metres. It inhabits shallow waters where it forms burrows in the sand, which are sometimes exposed during low tide. Males can reach a maximum total length of 73 centimetres, but more commonly reach a TL of 50 centimetres.
Dalophis boulengeri is an eel in the family Ophichthidae. It was described by Jacques Blache, Jean Cadenat and Alfred Stauch in 1970. It is a tropical, marine eel which is known from the eastern central and southeastern Atlantic Ocean, including Angola, Benin, the Democratic Republic of the Congo, Cameroon, Côte d'Ivoire, Equatorial Guinea, Guinea, Guinea-Bissau, Ghana, Gabon, Gambia, Liberia, Mauritania, Nigeria, Sierra Leone, Senegal, and Togo. It is active at night, and inhabits burrows during the daytime, leaving its head exposed. Males can reach a maximum total length of 57.4 centimetres, but more commonly reach a TL of 47.5 cm.
Dalophis multidentatus is an eel in the family Ophichthidae. It was described by Jacques Blache and Marie-Louise Bauchot in 1972. It is known from a single specimen collected from the Saloum River in Senegal, in the eastern Atlantic Ocean. It is known through this specimen to form burrows in sand or mud on the continental shelf, and to dwell at a depth of 50 metres. Males are able to reach a total length of 15.3 centimetres.
Dalophis obtusirostris is an eel in the family Ophichthidae. It was described by Jacques Blache and Marie-Louise Bauchot in 1972. It is a tropical, marine eel which is known from the eastern Atlantic Ocean, including Mauritania and Senegal. It inhabits estuaries and forms burrows in sand or mud. Males can reach a maximum total length of 38.8 centimetres.
Ethadophis epinepheli is an eel in the family Ophichthidae. It was described by Jacques Blache and Marie-Louise Bauchot in 1972. It is a tropical, marine eel which is known from a single specimen recovered from the stomach of a grouper in Senegal, in the eastern Atlantic Ocean. It is known to reach a total length of 42.4 centimetres.
Hemerorhinus opici is an eel in the family Ophichthidae. It was described by Jacques Blache and Marie-Louise Bauchot in 1972. It is a marine, tropical eel which is known from the eastern Atlantic Ocean, including Senegal and Angola. It inhabits shallow waters near to shore, and forms burrows in sand and mud substrates. Males can reach a maximum total length of 32.5 centimetres (12.8 in).
Mystriophis crosnieri, known commonly as the Spoon-nose eel in the United Kingdom, is an eel in the family Ophichthidae. It was described by Jacques Blache in 1971. It is a marine, tropical eel which is known from the eastern Atlantic Ocean, including Senegal, Angola, and the western Mediterranean. It dwells at a depth range of 75 to 300 metres, and forms burrows in sand and mud sediments on the continental shelf. Males can reach a maximum total length of 96.5 centimetres (38.0 in).
Ophichthus leonensis is an eel in the family Ophichthidae. It was described by Jacques Blache. It is a marine, deep water-dwelling eel which is known from a single specimen found in the stomach of a fish taken from a depth of 180 metres (590 ft) in Sierra Leone, in the eastern Atlantic Ocean. It is presumed to form burrows in sand or mud, as is common amongst eels. Males are known to reach a total length of 23.2 centimetres (9.1 in).
Phaenomonas longissima, also known as the short-maned sand eel in St. Helena, is an eel in the family Ophichthidae. It was described by Jean Cadenat and Émile Marchal in 1963, originally under the genus Callechelys. It is a marine, tropical eel which is known from the Atlantic Ocean, including Ascension Island, St. Helena, Brazil, Senegal, Ghana, and Cape Verde. It dwells at a depth range of 25 to 35 metres, and forms burrows in sand and mud sediments on the continental shelf. Males can reach a maximum total length of 50 centimetres (20 in).
Xyrias chioui is an eel in the family Ophichthidae. It was described by John E. McCosker, Chen Wei-Li and Chen Hong-Ming in 2009. It is a marine, subtropical eel which is known from Taiwan, in the Pacific Ocean. It generally dwells at a depth range of 60–70 meters. Males can reach a maximum total length of 81.9 centimeters.
The strict snake eel is an eel in the family Ophichthidae. It was described by David Starr Jordan and John Otterbein Snyder in 1901. It is a marine, temperate water-dwelling eel which is known from the Indo-Pacific, including Japan, the Philippines, the China Sea, and South Africa. It dwells at a depth range of 146 to 209 meters. Males can reach a maximum total length of 93 centimeters (37 in).
