Physical Description

Diagnostic Description

Description

Distribution: tropical and subtropical areas. Both eyes on left side of head; eyes very small with little interorbital space. Preopercle margin covered with skin. Asymmetrical mouth. Caudal fin pointed and confluent with dorsal and caudal fins. Right pelvic fin usually undeveloped. No pectoral fins. Dorsal fin origin at or in front of fixed (lower) eye. Vertebrae usually 9 or 10 + 33-66. To about 48 cm maximum length, usually below 30 cm. Tongue fishes are found in warm waters of all oceans (between 40° latitudes). Most species occur in shallow water or estuaries; many are commercially important.
  • MASDEA (1997).
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Source: World Register of Marine Species

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records: 563
Specimens with Sequences: 433
Specimens with Barcodes: 420
Species: 86
Species With Barcodes: 79
Public Records: 208
Public Species: 44
Public BINs: 49
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Source: Barcode of Life Data Systems (BOLD)

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Barcode data

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Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Tonguefish

Tonguefishes are a family, Cynoglossidae, of flatfishes. 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.[2] This family has three genera with a total of more than 140 species. The largest reaches a length of 66 cm (26 in), though most species only reach half that size or less.[3][4][5]

They are found in tropical and subtropical oceans, mainly in shallow waters and estuaries, though a few species found in deep sea floors, and a few in rivers.

Symphurus thermophilus lives in congregating around "ponds" of sulphur at hydrothermal vents on the seafloor. No other flatfish is known from hydrothermal vents.[6] Scientists are unsure of the mechanism that allows the fish to survive and even thrive in such a hostile environment.[7]

See also[edit]

References[edit]

  1. ^ Froese, Rainer, and Daniel Pauly, eds. (2012). "Cynoglossidae" in FishBase. October 2012 version.
  2. ^ Chapleau, Francois & Amaoka, Kunio (1998). Paxton, J.R. & Eschmeyer, W.N., ed. Encyclopedia of Fishes. San Diego: Academic Press. p. 225. ISBN 0-12-547665-5. 
  3. ^ Froese, Rainer, and Daniel Pauly, eds. (2014). Species of Cynoglossus in FishBase. May 2014 version.
  4. ^ Froese, Rainer, and Daniel Pauly, eds. (2014). Species of Paraplagusia in FishBase. May 2014 version.
  5. ^ Froese, Rainer, and Daniel Pauly, eds. (2014). Species of Symphurus in FishBase. May 2014 version.
  6. ^ Munroe, T.A. and Hashimoto, J. (2008). A new Western Pacific Tonguefish (Pleuronectiformes: Cynoglossidae): The first Pleuronectiform discovered at active Hydrothermal Vents. Zootaxa 1839: 43–59.
  7. ^ "Fish dance on sulphur cauldrons". BBC News. 14 December 2006. Retrieved 25 May 2010. 
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