flatfish

noun (plural same or flatfishes)

• a flattened marine fish that swims on its side with both eyes on the upper side. They live typically on the seabed and are coloured to resemble it.

  • Order Pleuronectiformes: several families, in particular Bothidae (left-eye flounders), Pleuronectidae (right-eye flounders), and Soleidae (soles)