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. The soft-shell clam digs a permanent burrow in which it remains for life unless disturbed. As it grows the clam enlarges and deepens its burrow. When the tide is in, this clam's long "neck" (actually its siphons) is thrust up to the opening of the burrow for feeding. When the tide goes out, the clam withdraws its "neck" and closes its shell until the tide comes in again.

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17y ago

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