Hard-shell clams, also known as quahogs, are a type of bivalve mollusk found in coastal waters. They have a thick, ridged shell that can vary in color from gray to brown. These clams are commonly harvested for food and are popular in various dishes, including chowders and clam bakes. These clams live buried in sand or mud and can be found along the Atlantic coast of North America. They filter-feed by drawing in water and extracting plankton and other nutrients. Hard-shell clams are an important part of the marine ecosystem and contribute to the health of their habitats.