Hippoglossus is a genus of very large righteye flounders. It comprises two species of halibut, with one species native to the northern Atlantic Ocean and the other species native to the northern Pacific Ocean.
| northern Atlantic, from Labrador and Greenland to Iceland, the Barents Sea and as far south as the Bay of Biscay and Virginia |
| Gulf of Alaska and the Bering Sea, off the west coast of Canada, coastal Washington, Oregon, and California |
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