Sea cucumber

What makes this gelatinous looking creature related to both sea stars and sea urchins? Well, it is by their tube feet and water hydraulic system that is used to produce suction or release it. Sea cucumbers have five rows of tube feet with some residing around their mouth and used as feeding tentacles. The tube feet are also used in locomotion and attachment. They have a hard calcerous endoskeleton but it is greatly reduced. Their bodies are sausage shaped and covered with bumps or soft spines. Sea cucumbers are mostly found on the sea floor and eat plankton or decaying organic material. They reproduce by releasing gametes (sperm and ova) into the sea. Some sea cucumbers can distract predators by throwing out their internal organs. Don't worry, they are able to regrow them.