Quahogs (hard clams) inhabit which type of bottom?

• A. Rocky intertidal pools
• B. Coral reefs
• C. Free-swimming near-surface water
• D. Sandy bottoms

Answer: (D)

Quahogs are bottom-dwelling, burrowing clams that live by burying themselves in the substrate and filtering water for food. This lifestyle fits sandy bottoms best because the sand provides a soft, stable layer for them to expand their muscular foot into and anchor themselves while their siphons draw in water. They’re commonly found in sheltered bays and estuaries where fine sand or sand–mud mixtures occur, rather than in rocky intertidal pools or coral reef environments, and they don’t swim near the surface. So, the bottom type that matches their lifestyle and habitat is sandy bottoms.