Which Oyster?

Which Oyster?

Observation - Which Oyster?. Description: Intact live oyster found threw up onto the beach by the recent easterly winds. At first glance I thought it was a single heavy valve but its both valves and it appears to be alive and well. Any species suggestions? 10cms long.

Intact live oyster found threw up onto the beach by the recent easterly winds. At first glance I thought it was a single heavy valve but its both valves and it appears to be alive and well. Any species suggestions? 10cms long.