This huge, funny-looking soft-shell clam hails from the Pacific Northwest. It averages 3 pounds in weight and is distinguished by a long (up to 18-inch) neck (siphon) that extends from its 6-inch shell. The neck can be cut or ground and used in chowders. The body meat, when sliced, pounded and sautéed, resembles abalone. See also clams; shellfish.