In 1990, under pressure from environmental groups, the largest seafood processing companies in the US agreed not to purchase tuna that was caught in ways causing unnecessary dolphin deaths. They labeled their new products "Dolphin Safe," in an effort to win consumer support.
在保育團體的壓力下，美國三大海產公司在一九九○年聯合起來，拒購讓海豚遭受不必要死亡的鮪魚，並在罐頭上印製「海豚安全」（Dolphin Safe）的標籤，要消費者支持。