Bivalves are a group of marine and freshwater animals with paired shells in which the plane of symmetry runs along the hinge line between the shells (opposite to brachiopods). Examples include mussels, oysters and scallops.
Bivalves are a group of marine and freshwater animals with paired shells in which the plane of symmetry runs along the hinge line between the shells (opposite to brachiopods). Examples include mussels, oysters and scallops.