The Olympia oysters displacement could predict a future for the Sydney Rock Oyster?

The Olympia used to range in great abundance from Baja California up to Vancouver, until overfishing during the gold rush began a decline that was hastened by pollution from industry and silt runoff from construction projects. As Olympia stocks plummeted, oyster farmers rushed to import Atlantic oysters from the East Coast and fast-growing Pacific oysters from the Miyagi region of Japan. The two outsider species quickly displaced the slow-growing native oyster. Soon Olympias all but ceased to be cultivated.
— Coby McDonald, Popular Science