Cynoglossus cynoglossus, commonly known as the Bengal tonguesole, sometimes called the Gangetic tongue sole, 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 east to the Philippines.

Cynoglossus cynoglossus
Bengal tonguesole, Cynoglossus cynoglossus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Pleuronectiformes
Family:	Cynoglossidae
Genus:	Cynoglossus
Species:	C. cynoglossus
Binomial name
Cynoglossus cynoglossus (F. Hamilton, 1822)
Synonyms
Achirus cynoglossus Hamilton, 1822 Icania cynoglossa (Hamilton, 1822) Plagusia cynoglossus (Hamilton, 1822) Plagusia oxyrhynchos Bleeker, 1851 Arelia oxyrhynchos (Bleeker, 1851) Cynoglossus oxyrhynchos (Bleeker, 1851) Plagusia bengalensis Bleeker, 1853 Cynoglossus bengalensis (Bleeker, 1853) Plagusia sumatrana Bleeker, 1854 Arelia sumatrensis (Bleeker, 1854) Cynoglossus sumatranus (Bleeker, 1854) Cynoglossus sumatrensis (Bleeker, 1854) Cynoglossus hamiltonii Günther, 1862 Cynoglossus buchanani Day, 1870 Cynoglossus deltae Jenkins, 1910

It reaches a length between 12.5 cm and 20 cm. The dorsal soft rays number between 95 and 102, and the anal soft rays between 72 and 78. It feeds on benthic invertebrates.