- flatfish - sweet lean whitish flesh of any of numerous thin-bodied fish; usually served as thin fillets
--1 is a kind of saltwater fish
--1 has particulars: flounder; sole, fillet of sole; halibut- flatfish - any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side
--2 is a kind of spiny-finned fish, acanthopterygian
--2 is a member of Heterosomata, order Heterosomata, order Pleuronectiformes
--2 has particulars:flounder; righteye flounder, righteyed flounder; halibut, holibut; lefteye flounder, lefteyed flounder; tonguefish, tongue-fish; sole - flatfish - any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side