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Students observe clams (Mercenaria) in a salt water aquarium, paying attention to siphons and any burrowing. They then remove the clams and describe the external morphology. The clams are then dissected, with special attention made to features (siphons, muscles) that leave observable marks on the shells. They are then provided the shells of a different genus (Mya) and asked to predict the soft tissue morphology and life mode.
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