Dungeness crab are found in the Pacific Ocean and in waters along the West Coast, while King crab are primarily found in the Atlantic Ocean. Dungeness crab are purplish-brown before they are cooked, while King crab are a bright orange. King crab are very large, with long legs, and can span up to 5-6 feet wide; Dungeness crab are smaller and grow up to 9 inches. In terms of flavor, Dungeness crab are favored by chefs for their sweet, succulent crab meat. Whereas, King crab has a very mild, bland flavor.