: Unlike gastropods (snails), bivalves lack a distinct head. Their body consists of a torso and a muscular "foot" used for burrowing or anchoring.

: Many species, such as scallops and oysters, are significant food sources for humans. Freshwater pearl mussels are also cultivated for pearl production.

: By filtering vast amounts of water, bivalves like mussels and oysters act as natural water purifiers in ecosystems.

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