What is another word for Subkingdom Parazoa?
Pronunciation: [sˈʌbkɪŋdəm pˌaɹəzˈə͡ʊə] (IPA) 
Subkingdom Parazoa is a term used to describe a group of aquatic animals that lack true tissues or organs. Synonyms for Subkingdom Parazoa include Placozoa, Mesozoans, and Sponge-like animals. Placozoa are the simplest multicellular animals and are grouped together with other Parazoans due to their lack of distinct cell types. Mesozoans are small, parasitic creatures that live in the tissues of marine invertebrates. Sponge-like animals include sponges, which are sessile filter feeders that lack nervous systems, muscles or organs, and are considered the simplest type of multicellular animals. The classification of these organisms is constantly evolving as new research is conducted and further understanding is gained.
