 Dungeness crabs ("Metacarcinus magister") occur throughout Washington waters, including Puget Sound.Many bivalves occur in Puget Sound, such as Pacific oysters ("Crassostrea gigas") and geoduck clams ("Panopea generosa").The Olympia oyster ("Ostreola conchaphila"), once common in Puget Sound, was depleted by human activities during the 20th century.