For some of the ocean's top predators, maintaining a decent diet requires some surprisingly long-distance dives. MIT oceanographers have found that big fish like tuna and swordfish get a large ...

For some of the ocean's top predators, maintaining a decent diet requires some surprisingly long-distance dives. MIT oceanographers have found that big fish like tuna and swordfish get a large ...

and if intending to get pregnant to avoid eating swordfish and large predatory species. Limits of four oily fish portions and no than one portion of the large predators were advised for other adults.