Will that stunt the oyster's growth?

The human interest piece in yesterday's noon public TV was about oyster farming. I have to admit, I've never thought much about it. Turns out that oyster farmers worry about water quality, much as dirt farmers get concerned about the soil. And then there are those oysters smoking...
( Underwater? )

So -- that was our 10 minute or so introduction to oyster farming. Frankly, I hadn't realized that they have to raise and lower the oysters to keep them in the best water. Or that they smoke while they are growing up!