Ostreidae

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.

True Oysters
Crassostrea gigas p1040847.jpg
Pacific oyster, Crassostrea gigas
Scientific classification
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Ostreidae

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.

Ostreidae Media

Other websites

  Data related to Ostreidae at Wikispecies
  Media related to Ostreidae at Wikimedia Commons