<P> Dolphin - safe labels are used to denote compliance with laws or policies designed to minimize dolphin fatalities during fishing for tuna destined for canning . </P> <P> Some labels impose stricter requirements than others . Dolphin - safe tuna labeling originates in the United States . The term Dolphin Friendly is often used in Europe, and has the same meaning, although in Latin America, the standards for Dolphin Safe / Dolphin Friendly tuna is different than elsewhere . The labels have become increasingly controversial since their introduction, particularly among sustainability groups in the U.S., but this stems from the fact that Dolphin Safe was never meant to be an indication of tuna sustainability . Many U.S. labels that carry dolphin safe label are amongst the least sustainable for oceans, according to Greenpeace's 2017 Shopping Guide . </P>

What does dolphin safe on a tuna can mean
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