Like flounder, sole is a variety of flatfish; in fact, the name sole in English and French comes from the fish?s resemblance to a sandal. The most common types of sole are petrale, rex, and dover, and they may be sold interchangeably under these names. Sole can be used in any recipe that calls for flounder.

Most U.S.-caught petrale sole is harvested in the West Coast groundfish trawl fishery. West Coast bottom trawl fisheries are highly regulated under a new trawl ?catch share? program, which encourages responsible fishing practices. Therefore, sole from the West Coast fishery is a sustainable choice.