DABOB BAY, Hood Canal — Inside the burbling tubs of the Taylor Shellfish hatchery here, oysters are incubating once again. But no one believes things are really back to normal.

Several years after oyster larvae around the Northwest began dying by the billions, hatcheries like this one are again ramping up production.

But that's just because they've learned to avoid pumping in problem seawater.

Few know better than Northwest oyster growers that ecological upheaval is still rattling their industry — and that it may be a sign of greater marine-world shifts to come.

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