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:560Public Records:196
Specimens with Sequences:423Public Species:42
Specimens with Barcodes:418Public BINs:45
Species:86         
Species With Barcodes:78         
          
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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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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Cynoglossidae

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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]

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.

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.[3]

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. ^ "Fish dance on sulphur cauldrons". BBC News. 14 December 2006. Retrieved 25 May 2010. 
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