What is "surf clam"

Sea clam \Sea" clam`\ (Zo["o]l.) Any one of the large bivalve mollusks found on the open seacoast, especially those of the family Mactrid[ae], as the common American species. ( Mactra solidissima or Spisula solidissima); -- called also beach clam, and surf clam.

The surf clam (Spisula solida, is a medium-sized marine clam, or bivalve mollusc commonly found in the waters surrounding Great Britain. Up to long, it is like many clams a sediment- burrowing filter feeder.

This species of clam is found at scattered locations around the British and Irish coasts.

The shell of the surf clam is the main ingredient in the Japanese food wash-solution Surfcera (or Anshin Yasai　安心やさい).