The giant California sea cucumber is the largest sea cucumber in the Pacific Northwest at around 20 inches (50 cm) in length, and is related to sea stars, feather stars, and sea urchins.  These echinoderms have a radial five part body design as well as a water vascular system that pumps water into their many tube feet for locomotion.  This same water hydraulic system is also used to extend the sea cucumber’s oral tentacles to gather food, and then retract those tentacles towards the mouth for feeding.