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Ostreidae facts for kids

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True Oysters
Crassostrea gigas p1040847.jpg
Pacific oyster, Crassostrea gigas
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Ostreoida
Family: Ostreidae
Rafinesque, 1815

Ostreidae are the true oysters. The family includes most species eaten under the name oyster. Pearl oysters are not true oysters because they belong to a different order, the Pterioida.

Like scallops, true oysters have a central adductor muscle. This causes a scar in the middle of the shell. It is the point of attachment. The shell is often irregular because oysters attach to substrates.

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