<Ul> <Li> Brachiopod shells </Li> <Li> Crustacean shells </Li> <Li> Horseshoe crabs </Li> <Li> Sea urchin tests </Li> </Ul> <Li> Sea urchin tests </Li> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul>

Marine and fresh water animals with soft bodies which are often covered with a hard shell