Dolphin-Safe Tuna: Conservation and Welfare

Dolphin-safe tuna labeling emerged from welfare and conservation concerns about dolphin encirclement in tuna fishing, but the story is more complex than the label suggests.

Key Facts

Eastern Pacific yellowfin tuna school below dolphin pods — a natural association exploited in purse seine fishing
Pre-dolphin-safe fishing killed an estimated 6-7 million dolphins between 1950-1990 in the Eastern Pacific
Dolphin-safe certification reduced dolphin mortality by over 97% in the US market since 1990
However, dolphin-safe methods (FAD fishing) have higher bycatch of juvenile tuna, sharks, and sea turtles
The welfare trade-off between dolphin safety and bycatch welfare costs is genuinely complex

Welfare Considerations

The dolphin-safe tuna story illustrates how animal welfare campaigns can achieve remarkable successes while creating unintended welfare consequences elsewhere in the system. The dramatic reduction in dolphin mortality is a genuine welfare achievement. However, the shift to fishing aggregation devices (FADs) to replace dolphin-set methods dramatically increased bycatch of other species — including sea turtles and sharks who have their own welfare interests. Recognizing this complexity does not diminish the dolphin-safe achievement but does highlight that comprehensive welfare assessment of fishing methods must consider all affected species, not just the most charismatic.

What You Can Do

Choose tuna with both dolphin-safe and sustainability certifications (MSC) to address multiple welfare dimensions
Support continued improvement of fishing practices that reduce all bycatch, not just dolphin bycatch
Engage with the complexity of dolphin-safe labeling rather than treating it as a simple welfare solution
Advocate for comprehensive bycatch reduction requirements that include all affected species
Reduce tuna consumption to reduce overall demand pressure on tuna fisheries and associated bycatch