What is another word for Class Echinoidea?
Pronunciation: [klˈas ˈɛt͡ʃɪnˌɔ͡ɪdi͡ə] (IPA) 
The Class Echinoidea is a group of marine animals that includes sea urchins, sand dollars, and sea biscuits. There are many synonyms that can be used to describe these creatures, including the term "echinoids," which refers to any member of the Echinoderm phylum that has a spherical or flattened body covered in spines. Other synonyms for Class Echinoidea include "sea hedgehogs," "sea cakes," and "urchinoids." These animals are known for their hard shells, which are covered in intricate patterns of spines and can be used both for protection and locomotion. Despite being relatively simple creatures, echinoids are important members of marine ecosystems, providing food for predators and helping to maintain healthy ocean environments.
