Subkingdom Metazoa is a term used in biology to describe a group of multicellular organisms that are classified as animals. Metazoa is further divided into several distinct groups, each with their specific characteristics and features. These groups include Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, and Chordata. All of these groups are part of the animal kingdom, and they are characterized by their diverse habitats and behaviors. Some synonyms for the subkingdom Metazoa include Animalia, Kingdom Animalia, and multicellular animals. All of these terms describe the same group of organisms, and they are used interchangeably in biology and zoology.