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A clam is a bivalve mollusc found mainly in marine waters. It is usually partially buried in sand or mud with the two parts of its shell slightly open for feeding. With a large foot for burrowing, its soft, flat body lies between two muscles for opening and closing the shells. A fleshy part called the mantle, lies next to the shells. Clams feed on plankton. Class: Pelecypoda.

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