I have a science project about them.|||Sea cucumbers are echinoderms. Sea cucumbers are sausage shaped, and their skin is covered with warty bumps or soft spines. When threatened, cucumbers can contract their muscles and shoot out water from their body making them shorter, thicker, and harder. Some can even shoot out their insides and then go and grow new insides.
Sea cucumbers have hundreds of tiny suction-cup tube feet that they use to crawl across the sea floor. Three common sea cucumbers are the warty sea cucumber, the California cucumber, and the white star cucumber. Warty sea cucumbers are chestnut brown with black-tipped "warts" all over their bodies. Warty sea cucumbers grow up to ten inches long. California sea cucumbers are brown to reddish-brown and are covered with pointed, cone-shaped projections. The California sea cucumber grows up to sixteen inches long. The white sea cucumber is light orange to white with long, nonretractable spines covering their bodies. White sea cucumbers grow up to four inches long.
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