Coming out of its shell

As fish stocks dwindle, we may find ourselves eating other sorts of seafood. Is shellfish a good alternative?

If it's just your own health you're worried about, eating lots of fish is a good idea. All that protein. Those omega-3 fats. Sure, you don't want to go overboard with the swordfish and other species known to contain mercury, but otherwise, eat up — it's good for your heart, and maybe your brain.

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