order
Oysters and Allies
Ostreida
Field notes
The order Ostreida includes the true oysters. One superfamily (Ostreoidea) and two extant families are recognised within it. The two families are Ostreidae, the true oysters, and Gryphaeidae, the foam oysters.
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Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Most observed native oysters and allies All
Native to the US, by observations.
