Where did they live? Bivalves live on the bottom of rivers, lakes and seas. Some, like scallops, lie on the surface but others burrow beneath it, where they have some protection from predators.

Where are bivalve shells found?

Bivalves are very common in essentially all aquatic locales, including saltwater, brackish water, and freshwater. The shells of bivalves commonly wash up on beaches (often as separate valves) and along the edges of lakes, rivers, and streams.

What is the habitat of a bivalve?

Most bivalves are found in coastal seas, but their diversity is greatest on continental landmasses, where large rivers create suitable deltaic habitats and the continental shelf is broad. Except on tropical ones with coral reefs, few bivalves are found on islands.