Orchestia is a genus of isopod crustaceans that are typically found on sandy beaches. While there are not many synonyms for the term orchestia, they are sometimes referred to as beach hoppers or sand hoppers. Another less common term for them is talitrids, which encompasses several different types of sand-dwelling crustaceans. Orchestia are known for their ability to jump long distances to avoid predators, and for their tendency to gather in large groups on beaches and other sandy areas. This makes them an important part of many coastal ecosystems, and a fascinating subject for researchers and beachcombers alike.