Bivalves are a type of mollusk characterized by their two-part shells, which are hinged together. Common examples include clams, oysters, and mussels. They live in various environments, from oceans to freshwater lakes, and play important roles in their ecosystems, such as filtering water and providing habitat for other marine life. These creatures feed by filtering tiny particles from the water, using their gills to trap food. Bivalves are also significant for humans, as they are a popular source of seafood and are often cultivated in aquaculture farms. Their shells can also be used in jewelry and decoration.