Tonguefish
Encyclopedia
Tonguefishes are a family, Cynoglossidae, of flatfish
Flatfish
The flatfish are an order of ray-finned fish, also called the Heterosomata, sometimes classified as a suborder of Perciformes. In many species, both eyes lie on one side of the head, one or the other migrating through and around the head during development...

es. They are distinguished by the presence of a long hook on the snout overhanging the mouth, and the absence of pectoral fins. Their eyes are both on the left side of their body, which also lacks a pelvic fin.

They are found in tropical and subtropical oceans, mainly in shallow waters and estuaries
Estuary
An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea....

, though a few species found in deep sea floors, and a few in river
River
A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

s.

Some species have been observed congregating around ponds of sulphur that pool up from beneath the seafloor. Scientists are unsure of the mechanism that allows the fish to survive and even thrive in such a hostile environment.

Species

There are 138 species in 3 genera:
  • Genus Cynoglossus
    Cynoglossus
    Cynoglossus is a genus of tonguefish. It is indigenous to the Indo-West Pacific region, most commonly found in shallow muddy or sandy waters along the coast of the Philippines, Thailand and the Malay peninsular, the South China Sea, Burma, the Bay of Bengal and as far west as the Red Sea...

    • Three-lined tongue sole, Cynoglossus abbreviatus
      Cynoglossus abbreviatus
      Cynoglossus abbreviatus, commonly known as the Three-lined tongue sole is a species of tonguefish. It is indigenous to the coast of the South China Sea, commonly found in shallow muddy or sandy waters along the coast of China, Taiwan, Korea and Japan. It was first described by Gray in 1834....

      (Gray
      John Edward Gray
      John Edward Gray, FRS was a British zoologist. He was the elder brother of George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray ....

      , 1834)
      .
    • Natal tongue-fish, Cynoglossus acaudatus
      Cynoglossus acaudatus
      Cynoglossus acaudatus, commonly known as the Natal tongue fish is a species of tonguefish. It is commonly found in shallow muddy or sandy waters along the coast of the Western Indian Ocean, Somalia down to South Africa, including Seychelles. It was first described by Gilchrist in 1906....

      Gilchrist, 1906.
    • Sharpnose tonguesole, Cynoglossus acutirostris
      Cynoglossus acutirostris
      Cynoglossus acutirostris, commonly known as the Sharpnose tongue sole is a species of tonguefish. It is commonly found in sandy waters of the western Indian Ocean, particularly the Red Sea and the Gulf of Aden. It was first described by Norman in 1939....

      Norman, 1939.
    • Largescale tonguesole, Cynoglossus arel
      Cynoglossus arel
      Cynoglossus arel, commonly known as the Largescale tonguesole is a species of tonguefish. It is commonly found in muddy and sandy bottoms of the Indo-West Pacific and Indian Ocean, from the Persian Gulf tp Sri Lanka and Indonesia and as far north as the south coast of Japan, down to depths of 125...

      (Bloch
      Marcus Elieser Bloch
      Marcus Elieser Bloch was a German medical doctor and naturalist. He is generally considered one of the most important ichthyologists of the 18th century.- Life :...

       & Schneider
      Johann Gottlob Schneider
      Johann Gottlob Theaenus Schneider was a German classicist and naturalist.-Biography:Schneider was born at Collm in Saxony...

      , 1801)
      .
    • Fourline tonguesole, Cynoglossus attenuatus
      Cynoglossus attenuatus
      Cynoglossus attenuatus, commonly known as the Fourline tonguesole is a species of tonguefish. It is commonly found in the western Indian Ocean off the eastern coast of Africa, from Delagoa Bay, Mozambique to Durban in South Africa. It was first described by Gilchrist and Thompson in 1917....

      (Gilchrist & Thompson, 1917).
    • Fourlined tonguesole, Cynoglossus bilineatus
      Cynoglossus bilineatus
      Cynoglossus bilineatus, commonly known as the Fourlined tonguesole is a species of tonguefish. It is commonly found in the Indian Ocean and Indo-West pacific....

      (Lacépède, 1802).
    • Southern tongue sole, Cynoglossus broadhursti
      Cynoglossus broadhursti
      Cynoglossus broadhursti, commonly known as the Southern tonguesole is a species of tonguefish. It is commonly found in the Indian Ocean....

      Waite, 1905.
    • Nigerian tonguesole, Cynoglossus browni
      Cynoglossus browni
      Cynoglossus browni, commonly known as the Nigerian tonguesole is a species of tonguefish. It is commonly found in Eastern Atlantic Ocean off the coast of west Africa....

      Chabanaud, 1949.
    • Ghanaian tonguesole, Cynoglossus cadenati
      Cynoglossus cadenati
      Cynoglossus cadenati, commonly known as the Ghanaian tonguesole is a species of tonguefish. It is commonly found in the eastern Atlantic Ocean off the coast of west Africa....

      Chabanaud, 1947.
    • Canary tonguesole, Cynoglossus canariensis
      Cynoglossus canariensis
      Cynoglossus canariensis, commonly known as the Canary tonguesole is a species of tonguefish. It is commonly found in the eastern Atlantic Ocean off western Africa....

      Steindachner
      Franz Steindachner
      Franz Steindachner was an Austrian zoologist.- Work and career :Being interested in natural history, Steindachner took up the study of fossil fishes on the recommendation of his friend Eduard Suess...

      , 1882
      .
    • Sand tonguefish, Cynoglossus capensis
      Cynoglossus capensis
      Cynoglossus capensis, commonly known as the Sand tonguesole is a species of tonguefish. It is commonly found in southeastern Atlantic Ocean off Namibia....

      (Kaup
      Johann Jakob Kaup
      Johann Jakob Kaup was a German naturalist.-Biography:He was born at Darmstadt. After studying at Göttingen and Heidelberg he spent two years at Leiden, where his attention was specially devoted to the amphibians and fishes. He then returned to Darmstadt as an assistant in the grand ducal museum,...

      , 1858)
      .
    • Hooked tonguesole, Cynoglossus carpenteri
      Cynoglossus carpenteri
      Cynoglossus carpenteri, commonly known as the Hooked tonguesole is a species of tonguefish. It is commonly found in the Indian Ocean....

      Alcock
      Alfred William Alcock
      Alfred William Alcock was a British physician naturalist and carcinologist.Alcock was the son of a sea-captain, John Alcock in Bombay, India who retired to live in Blackheath...

      , 1889
      .
    • Bengal tongue sole, Cynoglossus cynoglossus
      Cynoglossus cynoglossus
      Cynoglossus cynoglossus, commonly known as the Bengal tonguesole is a species of tonguefish. It is commonly found in the Indian Ocean, particularly in brackish water and muddy or sandy bottoms off the coast of India, Bangladesh and Burma....

      (Hamilton
      Francis Buchanan-Hamilton
      Dr Francis Buchanan, later known as Francis Hamilton but often referred to as Francis Buchanan-Hamilton was a Scottish physician who made significant contributions as a geographer, zoologist, and botanist while living in India.The standard botanical author abbreviation Buch.-Ham. is applied to...

      , 1822)
      .
    • Roundhead toungesole, Cynoglossus dispar
      Cynoglossus dispar
      Cynoglossus dispar, commonly known as the Roundhead tonguesole is a species of tonguefish. It is commonly found in the Indian Ocean, particularly off the coast of India, and Pakistan....

      Day, 1877.
    • Cynoglossus dollfusi (Chabanaud, 1931).
    • Carrot tonguesole, Cynoglossus dubius
      Cynoglossus dubius
      Cynoglossus dubius, commonly known as the Carrot tonguesole is a species of tonguefish. It is commonly found in the Indian Ocean off the coast of India....

      Day, 1873.
    • Durban tonguesole, Cynoglossus durbanensis
      Cynoglossus durbanensis
      Cynoglossus durbanensis, commonly known as the Durban tonguesole is a species of tonguefish. It is commonly found in the western Indian Ocean off the coast of Kenya, Madagascar, Mozambique and South Africa....

      Regan, 1921.
    • River tonguesole, Cynoglossus feldmanni
      Cynoglossus feldmanni
      Cynoglossus feldmanni, commonly known as the River tonguesole is a species of tonguefish. It is commonly found in Thailand, Laos, Borneo, Sumatra and Cambodia....

      (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1853)
      .
    • Ripplefin tonguesole, Cynoglossus gilchristi
      Cynoglossus gilchristi
      Cynoglossus gilchristi, commonly known as the Ripplefin tonguesole is a species of tonguefish. It is commonly found in the western Indian Ocean off Delagoa Bay, Mozambique, South Africa and Madagascar....

      Regan, 1920.
    • Cynoglossus gracilis Günther, 1873.
    • Freshwater tongue sole, Cynoglossus heterolepis Weber, 1910.
    • Genko sole, Cynoglossus interruptus Günther, 1880.
    • Cynoglossus itinus (Snyder, 1909).
    • Red tonguesole, Cynoglossus joyneri Günther, 1878.
    • Cynoglossus kapuasensis Fowler, 1905.
    • Shortheaded tonguesole, Cynoglossus kopsii (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Lachner's tonguesole, Cynoglossus lachneri Menon, 1977.
    • Roughscale tonguesole, Cynoglossus lida (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Cynoglossus lighti Norman, 1925.
    • Cynoglossus lineolatus Steindachner
      Franz Steindachner
      Franz Steindachner was an Austrian zoologist.- Work and career :Being interested in natural history, Steindachner took up the study of fossil fishes on the recommendation of his friend Eduard Suess...

      , 1867
      .
    • Long tongue sole, Cynoglossus lingua
      Cynoglossus lingua
      Cynoglossus lingua, commonly known as the long tongue sole or textile tongue sole is a species of tonguefish. It is indigenous to the Indo-West Pacific region, commonly found in shallow muddy or sandy waters along the coast of the Philippines, Thailand and the Malay peninsular, Burma, the Bay of...

      Hamilton, 1822.
    • Cynoglossus maccullochi Norman, 1926.
    • Cynoglossus macrolepidotus (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Big-eyed tongue-sole, Cynoglossus macrophthalmus Norman, 1926.
    • Malabar tonguesole, Cynoglossus macrostomus Norman, 1928.
    • Cynoglossus maculipinnis Rendahl, 1921.
    • Threeline tonguesole, Cynoglossus marleyi Regan, 1921.
    • Cynoglossus melampetalus (Richardson
      John Richardson (naturalist)
      Sir John Richardson was a Scottish naval surgeon, naturalist and arctic explorer.Richardson was born at Dumfries. He studied medicine at Edinburgh University, and became a surgeon in the navy in 1807. He traveled with John Franklin in search of the Northwest Passage on the Coppermine Expedition of...

      , 1846)
      .
    • Smallscale tonguesole, Cynoglossus microlepis (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Guinean tonguesole, Cynoglossus monodi Chabanaud, 1949.
    • Cynoglossus monopus (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1849)
      .
    • Cynoglossus nigropinnatus Ochiai, 1963.
    • Cynoglossus ogilbyi Norman, 1926.
    • Cynoglossus oligolepis (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1854)
      .
    • Cynoglossus pottii Steindachner
      Franz Steindachner
      Franz Steindachner was an Austrian zoologist.- Work and career :Being interested in natural history, Steindachner took up the study of fossil fishes on the recommendation of his friend Eduard Suess...

      , 1902
      .
    • Speckled tonguesole, Cynoglossus puncticeps
      Cynoglossus puncticeps
      Cynoglossus puncticeps, commonly known as the Speckled tonguesole is a species of tonguefish. It is indigenous to the Indo-West Pacific region, commonly found in shallow muddy or sandy waters along the coast of the Philippines, Thailand and the Malay peninsular, Burma, the Bay of Bengal and off...

      (Richardson
      John Richardson (naturalist)
      Sir John Richardson was a Scottish naval surgeon, naturalist and arctic explorer.Richardson was born at Dumfries. He studied medicine at Edinburgh University, and became a surgeon in the navy in 1807. He traveled with John Franklin in search of the Northwest Passage on the Coppermine Expedition of...

      , 1846)
      .
    • Cynoglossus purpureomaculatus Regan, 1905.
    • Cynoglossus robustus Günther, 1873.
    • Cynoglossus roulei Wu, 1932.
    • Cynoglossus sealarki Regan, 1908.
    • Bengal tongue-sole, Cynoglossus semifasciatus Day, 1877.
    • Tongue sole, Cynoglossus semilaevis Günther, 1873.
    • Senegalese tonguesole, Cynoglossus senegalensis (Kaup
      Johann Jakob Kaup
      Johann Jakob Kaup was a German naturalist.-Biography:He was born at Darmstadt. After studying at Göttingen and Heidelberg he spent two years at Leiden, where his attention was specially devoted to the amphibians and fishes. He then returned to Darmstadt as an assistant in the grand ducal museum,...

      , 1858)
      .
    • Cynoglossus sibogae Weber, 1913.
    • Cynoglossus sinicus Wu, 1932.
    • Cynoglossus sinusarabici (Chabanaud, 1931).
    • Cynoglossus suyeni
      Cynoglossus suyeni
      Cynoglossus suyeni is a species of tonguefish. It is indigenous to the Indo-West Pacific region, found along the coast of the Philippines through Celebes, to the Timor Sea and less common off Taiwan. It was first described by Fowler in 1934....

      Fowler, 1934.
    • Cynoglossus trigrammus Günther, 1862.
    • Macau sole, Cynoglossus trulla (Cantor
      Theodore Edward Cantor
      Theodore Edward Cantor was a Danish physician, zoologist and botanist.Cantor worked for the British East India Company. He made natural history collections in Penang and Malacca...

      , 1849)
      .
    • Cynoglossus waandersii (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1854)
      .
    • Zanzibar tonguesole, Cynoglossus zanzibarensis Norman, 1939.
  • Genus Paraplagusia
    Paraplagusia
    Paraplagusia is a genus of tonguefish. It is indigenous to the Indo-West Pacific region, commonly found in shallow muddy or sandy waters along the coast of the Philippines, Thailand and the Malay peninsular, Burma, the Bay of Bengal and as far west as the Red Sea.-Species:** Doublelined tonguesole,...

    • Doublelined tonguesole, Paraplagusia bilineata (Lacépède, 1802).
    • Bloch's tonguesole, Paraplagusia blochii (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Paraplagusia guttata (Macleay, 1878).
    • Black cow-tongue, Paraplagusia japonica (Temminck
      Coenraad Jacob Temminck
      Coenraad Jacob Temminck was a Dutch aristocrat and zoologist.Temminck was the first director of the National Natural History Museum at Leiden from 1820 until his death. His Manuel d'ornithologie, ou Tableau systematique des oiseaux qui se trouvent en Europe was the standard work on European birds...

       & Schlegel
      Hermann Schlegel
      Hermann Schlegel was a German ornithologist and herpetologist.-Early life and education:Schlegel was born at Altenburg, the son of a brassfounder. His father collected butterflies, which stimulated Schlegel's interest in natural history...

      , 1846)
      .
    • Long-snouted tongue sole, Paraplagusia longirostris Chapleau, Renaud & Kailola, 1991.
    • Dusky tongue sole, Paraplagusia sinerama Chapleau & Renaud, 1993.
  • Genus Symphurus
    Symphurus
    Symphurus is the most speciose genus of tonguefish, family Cynoglossidae. They are distinguished by merged dorsal, caudal, and anal fins, the absence of a lateral line and pectoral fins, and the presence of only one pelvic fin. They are sinistral flatfishes, meaning that as adults their craniums...

    • Caribbean tonguefish, Symphurus arawak Robins & Randall, 1965.
    • Inkspot tonguefish, Symphurus atramentatus Jordan
      David Starr Jordan
      David Starr Jordan, Ph.D., LL.D. was a leading eugenicist, ichthyologist, educator and peace activist. He was president of Indiana University and Stanford University.-Early life and education:...

       & Bollman, 1890
      .
    • California tonguefish, Symphurus atricaudus (Jordan
      David Starr Jordan
      David Starr Jordan, Ph.D., LL.D. was a leading eugenicist, ichthyologist, educator and peace activist. He was president of Indiana University and Stanford University.-Early life and education:...

       & Gilbert, 1880)
      .
    • Symphurus australis (Rendahl, 1922).
    • Symphurus bathyspilus Krabbenhoft & Munroe, 2003.
    • Kriete's tonguefish, Symphurus billykrietei Munroe, 1998.
    • Chocolate tonguefish, Symphurus callopterus Munroe & Mahadeva, 1989.
    • Symphurus caribbeanus Munroe, 1991.
    • Chabanaud's tonguefish, Symphurus chabanaudi Mahadeva & Munroe, 1990.
    • Offshore tonguefish, Symphurus civitatium Ginsburg, 1951.
    • Devil's tonguefish, Symphurus diabolicus Mahadeva & Munroe, 1990.
    • Spottedfin tonguefish, Symphurus diomedeanus (Goode
      George Brown Goode
      George Brown Goode , was an ichthyologist, although most of his time was spent as a museum administrator and he was very interested in the history of science, especially the history of the development of science in America. Goode graduated from Wesleyan University and studied at Harvard University...

       & Bean
      Tarleton Hoffman Bean
      Tarleton Hoffman Bean was an American ichthyologist, born at Bainbridge, Pennsylvania on 8 October 1846. He died in Albany, New York on 28 December 1916.-FAMILY AND EDUCATION :...

      , 1885)
      .
    • Elongate tonguefish, Symphurus elongatus (nil).
    • Banded tongue-fish, Symphurus fasciolaris Gilbert, 1892.
    • Symphurus fuscus Brauer, 1906.
    • Symphurus gilesii (Alcock
      Alfred William Alcock
      Alfred William Alcock was a British physician naturalist and carcinologist.Alcock was the son of a sea-captain, John Alcock in Bombay, India who retired to live in Blackheath...

      , 1889)
      .
    • Ginsburg's tonguefish, Symphurus ginsburgi Menezes & Benvegnú, 1976.
    • Gorgonian tonguefish, Symphurus gorgonae Chabanaud, 1948.
    • Symphurus hondoensis Hubbs, 1915.
    • Symphurus insularis Munroe, Brito & Hernández, 2000.
    • Jenyn's tonguefish, Symphurus jenynsi Evermann & Kendall, 1907.
    • Symphurus kyaropterygium Menezes & Benvegnú, 1976.
    • Lee's tonguefish, Symphurus leei Jordan
      David Starr Jordan
      David Starr Jordan, Ph.D., LL.D. was a leading eugenicist, ichthyologist, educator and peace activist. He was president of Indiana University and Stanford University.-Early life and education:...

       & Bollman, 1890
      .
    • Elongate tonguesole, Symphurus ligulatus (Cocco, 1844).
    • Symphurus lubbocki Munroe, 1990.
    • Symphurus luzonensis Chabanaud, 1955.
    • Symphurus macrophthalmus (Norman, 1926).
    • Symphurus maldivensis Chabanaud, 1955.
    • Margined tonguefish, Symphurus marginatus (Goode
      George Brown Goode
      George Brown Goode , was an ichthyologist, although most of his time was spent as a museum administrator and he was very interested in the history of science, especially the history of the development of science in America. Goode graduated from Wesleyan University and studied at Harvard University...

       & Bean
      Tarleton Hoffman Bean
      Tarleton Hoffman Bean was an American ichthyologist, born at Bainbridge, Pennsylvania on 8 October 1846. He died in Albany, New York on 28 December 1916.-FAMILY AND EDUCATION :...

      , 1886)
      .
    • Symphurus marmoratus (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Drab tonguefish, Symphurus melanurus Clark, 1936.
    • Blackstripe tonguefish, Symphurus melasmatotheca Munroe & Nizinski, 1990.
    • Smallfin tonguefish, Symphurus microlepis (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1851)
      .
    • Symphurus microrhynchus (Weber, 1913).
    • Largescale tonguefish, Symphurus minor Ginsburg, 1951.
    • Symphurus monostigmus Munroe, 2006.
    • Freckled tonguefish, Symphurus nebulosus (Goode
      George Brown Goode
      George Brown Goode , was an ichthyologist, although most of his time was spent as a museum administrator and he was very interested in the history of science, especially the history of the development of science in America. Goode graduated from Wesleyan University and studied at Harvard University...

       & Bean
      Tarleton Hoffman Bean
      Tarleton Hoffman Bean was an American ichthyologist, born at Bainbridge, Pennsylvania on 8 October 1846. He died in Albany, New York on 28 December 1916.-FAMILY AND EDUCATION :...

      , 1883)
      .
    • Tonguesole, Symphurus nigrescens Rafinesque
      Constantine Samuel Rafinesque-Schmaltz
      Constantine Samuel Rafinesque-Schmaltz, as he is known in Europe, was a nineteenth-century polymath who made notable contributions to botany, zoology, the study of prehistoric earthworks in North America and Mesoamerican ancient linguistics.Rafinesque was eccentric, and is often portrayed as an...

      , 1810
      .
    • Norman's tonguesole, Symphurus normani Chabanaud, 1950.
    • Symphurus novemfasciatus Shen & Lin, 1984.
    • Double-spot tonguesole, Symphurus ocellatus (nil).
    • Symphurus oculellus Munroe, 1991.
    • Spotfin tonguefish, Symphurus oligomerus Mahadeva & Munroe, 1990.
    • Ocellated tonguefish, Symphurus ommaspilus Böhlke, 1961.
    • Symphurus orientalis (Bleeker
      Pieter Bleeker
      Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

      , 1879)
      .
    • Pygmy tonguefish, Symphurus parvus Ginsburg, 1951.
    • Longtail tonguefish, Symphurus pelicanus Ginsburg, 1951.
    • Deepwater tonguefish, Symphurus piger (nil).
    • Blackcheek tonguefish, Symphurus plagiusa (Linnaeus
      Carolus Linnaeus
      Carl Linnaeus , also known after his ennoblement as , was a Swedish botanist, physician, and zoologist, who laid the foundations for the modern scheme of binomial nomenclature. He is known as the father of modern taxonomy, and is also considered one of the fathers of modern ecology...

      , 1766)
      .
    • Duskycheek tonguefish, Symphurus plagusia (Bloch
      Marcus Elieser Bloch
      Marcus Elieser Bloch was a German medical doctor and naturalist. He is generally considered one of the most important ichthyologists of the 18th century.- Life :...

       & Schneider
      Johann Gottlob Schneider
      Johann Gottlob Theaenus Schneider was a German classicist and naturalist.-Biography:Schneider was born at Collm in Saxony...

      , 1801)
      .
    • Halfstriped tonguefish, Symphurus prolatinaris Munroe, Nizinski & Mahadeva, 1991.
    • Northern tonguefish, Symphurus pusillus (Goode
      George Brown Goode
      George Brown Goode , was an ichthyologist, although most of his time was spent as a museum administrator and he was very interested in the history of science, especially the history of the development of science in America. Goode graduated from Wesleyan University and studied at Harvard University...

       & Bean
      Tarleton Hoffman Bean
      Tarleton Hoffman Bean was an American ichthyologist, born at Bainbridge, Pennsylvania on 8 October 1846. He died in Albany, New York on 28 December 1916.-FAMILY AND EDUCATION :...

      , 1885)
      .
    • Symphurus regani Weber & de Beaufort, 1929.
    • Symphurus reticulatus Munroe, 1990.
    • Patchtail tonguefish, Symphurus rhytisma Böhlke, 1961.
    • Symphurus schultzi Chabanaud, 1955.
    • Sevenband tonguesole, Symphurus septemstriatus (Alcock
      Alfred William Alcock
      Alfred William Alcock was a British physician naturalist and carcinologist.Alcock was the son of a sea-captain, John Alcock in Bombay, India who retired to live in Blackheath...

      , 1891)
      .
    • Blotchfin tonguefish, Symphurus stigmosus Munroe, 1998.
    • Blackbelly tonguesole, Symphurus strictus Gilbert, 1905.
    • Symphurus tessellatus (Quoy
      Jean René Constant Quoy
      Jean René Constant Quoy was a French zoologist.Along with Joseph Paul Gaimard he served as naturalist aboard La Coquille under Louis Isidore Duperrey during its circumnavigation of the globe , and the Astrolabe under the command of Jules Dumont d'Urville...

       & Gaimard
      Joseph Paul Gaimard
      Joseph Paul Gaimard was a French naval surgeon and naturalist.Along with Jean René Constant Quoy he served as naturalist on the ships L'Uranie under Louis de Freycinet 1817-1820, and L'Astrolabe under Jules Dumont d'Urville 1826-1829...

      , 1824)
      .
    • Symphurus thermophilus
      Symphurus thermophilus
      Symphurus thermophilus is a species of tonguefish, family Cynoglossidae, notable for being the only flatfish known to be an obligate inhabitant of hydrothermal vents. It is known from several widely dispersed locations in the western Pacific Ocean and occurs in great numbers...

    • Trewavas' tonguefish, Symphurus trewavasae Chabanaud, 1948.
    • Threeband tonguesole, Symphurus trifasciatus (Alcock
      Alfred William Alcock
      Alfred William Alcock was a British physician naturalist and carcinologist.Alcock was the son of a sea-captain, John Alcock in Bombay, India who retired to live in Blackheath...

      , 1894)
      .
    • Symphurus undatus Gilbert, 1905.
    • Dark cheek tongue, Symphurus undecimplerus Munroe & Nizinski, 1990.
    • Spottail tonguefish, Symphurus urospilus Ginsburg, 1951.
    • Symphurus vanmelleae Chabanaud, 1952.
    • Symphurus variegatus (Gilchrist, 1903).
    • Mottled tonguefish, Symphurus varius Garman, 1899.
    • William's tonguefish, Symphurus williamsi Jordan
      David Starr Jordan
      David Starr Jordan, Ph.D., LL.D. was a leading eugenicist, ichthyologist, educator and peace activist. He was president of Indiana University and Stanford University.-Early life and education:...

       & Culver, 1895
      .
    • Symphurus woodmasoni (Alcock
      Alfred William Alcock
      Alfred William Alcock was a British physician naturalist and carcinologist.Alcock was the son of a sea-captain, John Alcock in Bombay, India who retired to live in Blackheath...

      , 1889)
      .
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