noun, plural (especially collectively) flatfish (especially referring to two or more kinds or species) flatfishes.
any fish of the order Heterosomata (Pleuronectiformes), including the halibut, sole, flounder, etc., having a greatly compressed body and swimming on one side, with both eyes on the upper side in the adult.
The mimic octopus can impersonate lots of underwater creatures, including flatfish.
flatfish with their eyes topside wear mottled camouflage so spot-on that they hide in plain sight.
Some species, such as flatfish, have actually quadrupled.
flatfish are the closest living relatives to swordfish and marlins.
It turns into a flatfish by folding its arms back into a leaf shape and undulating them up and down.
Being the thickest and meatiest of all the flatfish smaller t, winter flounder are highly prized as a food fish.
British Dictionary definitions for flatfish
noun (pl) -fish, -fishes
any marine spiny-finned fish of the order Heterosomata, including the halibut, plaice, turbot, and sole, all of which (when adult) swim along the sea floor on one side of the body, which is highly compressed and has both eyes on the uppermost side