Echinoderms are a group of marine invertebrates that includes starfish, sea cucumbers, sea urchins, and sand dollars
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Echinoderms are a group of marine invertebrates that includes starfish, sea cucumbers, sea urchins, and sand dollars, and are found in all oceans and are important components of marine ecosystems. They have a unique body structure that is well-adapted for life in the ocean. They have a radial symmetry, meaning that their body parts are arranged in a circle around a central point. This allows them to move in any direction. They also have a hard, spiny skin that protects them from predators. They have an interesting method of feeding. They use their tube feet to capture and move food particles to their mouth. They also have a special type of jawless mouth called an Aristotle's lantern which is used to grind up food and can important components of marine ecosystems, and are important predators, scavengers, and filter feeders. They help to keep the ocean clean by consuming algae and other organic matter. They also provide food for many other animals, such as fish and sea birds and can also important to humans, and are harvested for food, and their shells are used to make jewelry and other decorative items and are studied by scientists to learn more about marine life and the ocean environment and can fascinating creatures that play an important role in the ocean, and are an important part of the marine food web and help to keep the ocean clean and are important to humans and have many uses.