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Clam worm (Nereis spp.) Clam worms are free swimming, segmented worms with four pairs of tentacles and one pair of antennae. Each segment has a pair of bristly, paddle-like appendages (parapodia) that enable them to swim in the water or crawl along the seafloor. Clam worms feed on algae and other invertebrates that they find by burrowing in the sand or mud. They are food for bottom feeding fish and crabs. |