Marine Animals

Dolphin-Safe Tuna and Bycatch Welfare History

The dolphin-safe tuna movement transformed fishing practices after public outrage at purse seine nets encircling dolphin schools to catch tuna in the Eastern Pacific.

Key Facts

Eastern Pacific yellowfin tuna school beneath dolphin pods, leading to fishing sets on dolphins
Over 7 million dolphins were killed in Eastern Pacific tuna fisheries between 1959 and 1972
The Marine Mammal Protection Act (1972) required dramatic reduction in dolphin mortality
Dolphin-safe labeling was introduced in 1990 driving consumer purchase of non-dolphin-associated tuna
The campaign is credited as one of the most successful marine animal welfare consumer campaigns

Welfare Considerations

Dolphins encircled in purse seine nets experienced drowning, injury from the net, and acute stress in large numbers. The dolphin-safe tuna campaign demonstrates that consumer pressure can drive rapid and substantial changes in industrial fishing practices. However, some researchers note that dolphin-safe tuna may involve higher bycatch of juvenile tuna and other species, illustrating that wildlife welfare trade-offs can be complex.

What You Can Do

Choose tuna labeled dolphin-safe as a minimum welfare standard
Understand the ongoing trade-offs in different tuna fishing methods
Support comprehensive bycatch monitoring and reporting for all tuna fisheries
Reduce tuna consumption to lower demand pressure on any fishing method
Advocate for comprehensive multi-species bycatch standards beyond dolphin protection alone