I love oysters and whenever possible I buy them from the farms on Prince Of Wales. I hope that they are given the all clear sign as soon as the toxian levels drop to safe numbers.
Having seen a batch of kittens die from eating bad clams, it's not anything I would want to experience!
When it comes right down to it, oyster farming is like farming wheat or other crops. Sometimes nature attacks crops with a blight or grasshoppers and farmers loose whole fields. 
Hopefully, oyster farming in Southeast Alaska will fare better then the farmers in the Mid-west have.
Farming is a tough job! Hard way to make a living at times but can be a very good way of making a living as long as you are prepared ahead of time for the bad times and can wait them out L