👉 Polyzoan, also known as a jellyfish, is a type of marine animal that belongs to the phylum Mollusca. They are characterized by their hard outer shell and soft body. Jellyfish have a distinct appearance due to their unique shape and coloration. Jellyfish are usually found in freshwater environments, but they can also be found in saltwater or seawater. They live in a variety of habitats, including coral reefs, mangrove forests, and estuaries.