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 peninsula, Burma, the Bay of Bengal and as far west as the Red Sea. The eyed side of the fish is typically reddish brown, sometimes with irregular brown-black patches, with a large black blotch on gill cover.