French oyster mystery

Plague strikes French oysters - Telegraph

Something is killing the oysters of France.

Here's something I didn't know:

Last year, France's oyster industry – Europe's largest – was hit by its worst crisis since the native European or "Portuguese" oyster was all but wiped out 30 years ago. Since then almost all oyster farms in Europe have been restocked with the Pacific "creuse" oyster from Japan and British Columbia.

So the oysters I can get from France are exactly the same species as those farmed in much of Australia. (However, I generally go for Sydney Rock oysters over Pacific, as I don't really like the larger size of the latter.)