An example of a flatfish.
flatfish definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
flatfish definition by American Heritage Dictionary
noun pl. flatfish flatfish or flat·fish·es
Any of numerous chiefly marine fishes of the order Pleuronectiformes, including the flounders, soles, and halibuts, having a laterally compressed body with both eyes on the upper side.
Variant of flatfish