The California sea cucumber is the largest sea cucumber in the Pacific Northwest at 20 inches (50 cm) in length, and is related to sea stars, sea urchins and sand dollars. 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. The button link clicked to get to this page shows a California sea cucumber gathering food from a kelp frond. Other varieties of sea cucumbers found here on the west coast are passive suspension feeders and extend their fine oral tentacles into the surrounding water gathering food passing by in the current.