Any of theflatfishes in the taxonomic familyCynoglossidae, distinguished by the presence of a long hook on the snout overhanging the mouth.
1988, Gar Goodson,Fishes of the Pacific Coast[1], page163:
Members of the family Cynoglossidae, thetonguefishes are for the most part too small to be of much interest as food fishes.
1997, David W. Greenfield, Jamie E. Thomerson,Fishes of the Continental Waters of Belize,page252:
Thetonguefishes are flatfishes found in the tropical and subtropical seas of the world, hut some species are found in freshwater hahitats (see Achiridae for a discussion of flatfishes).
2010, Pat Senson,Nasty, Brutish, and Short: The Quirks and Quarks Guide to Animal Sex and Other Weird Behaviour[2], page249:
But thetonguefish are unaffected by the noxious gases. The ”narked" fish end up as chow for thetonguefish.
