The surf clam (Spisula solida) is a medium-sized marine clam, or bivalve mollusc, found in the Eastern Atlantic from Iceland and northern Norway to Portugal and Spain. Up to 5 centimetres (2.0 in) long, it is like many clams a sediment-burrowing filter feeder. This species of clam is found in sandy bottom in the sublittoral zone. It is commonly found in the North Sea, Baltic Sea and the Irish Sea.