''Cynoglossus feldmanni'', commonly known as the River tonguesole is a species of

tonguefish Tonguefishes are flatfish in the family Cynoglossidae. 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 bodies, which also ...

occurring in freshwater. It is commonly found in

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...

, Laos,

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, Sumatra and

Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailan ...

. It occurs in rivers in freshwater well above the tidal zone where it lives on the bottom feeding on benthic invertebrates.

References

Cynoglossidae Fish described in 1853 {{Pleuronectiformes-stub