Hundreds of thousands of marine mammals are injured or killed every year by fishermen around the world. And because most seafood in the U.S. is imported, that means our fish isn't as dolphin-friendly as you might expect.
Under pressure from conservation groups, federal regulators are preparing to tighten import standards to better protect marine mammals.
There was a time, more than 40 years ago, when U.S. fishermen killed millions of dolphins while fishing for tuna. After a public backlash, fishermen figured out how to minimize that so-called bycatch.