Suborder Natantia refers to the order of crustaceans that spend most of their time swimming freely in the water. There are several synonyms for this term, including the suborder Caridea, which denotes shrimp-like crustaceans that are commonly found in freshwater and saltwater environments. Another synonym is the suborder Decapoda, which refers to crustaceans that have ten legs, including crabs, lobsters, and shrimp. Additionally, the suborder Dendrobranchiata is often used to describe larger shrimp species, while the suborder Pleocyemata encompasses various crustaceans such as crayfish, prawns, and true crabs. Regardless of the synonym used, Suborder Natantia is an essential category for describing the diverse world of aquatic crustaceans.