Flouner (rarely: flukes) are flatfish that live in ocean waters ie., Northern Atlantic and waters along the east coast of the United States and Canada, and the Pacific Ocean, as well. The name "flounder" refers to several geographically and taxonomically distinct species. In Europe, the name flounder refers to Platichthys flesus, in the Western Atlantic there are the summer flounder Paralichthys dentatus, southern flounder Paralichthys lethostigma, and the winter flounder Pseudopleuronectes americanus, among other species. In Japan, the Japanese flounder Paralichthys olivaceus is common.