Amphipoda is a term used to describe a suborder of crustaceans that are characterized by having a laterally flattened body and a distinctive pair of pincers known as gnathopods. While this term is commonly used in scientific literature, there are also several synonyms that refer to the same group of animals. These include amphipods, beach fleas, sand hoppers, and scuds. In addition, there are several more specific subgroups within the Amphipoda, such as the Gammaridea and the Caprellidea, which also have their own unique synonyms. Regardless of the precise terminology used, these fascinating creatures play an important role in aquatic ecosystems and are a subject of interest for researchers and nature enthusiasts alike.