Wild Dolphin Welfare in Fisheries Bycatch

Dolphins are caught as bycatch in global fisheries at devastating scale — entanglement, drowning, and injury cause significant welfare harm to highly intelligent, social marine mammals.

Key Facts

An estimated 300,000 cetaceans (dolphins, porpoises, and whales) are killed as fisheries bycatch annually worldwide.
Common dolphin bycatch in European pelagic trawlers has caused populations to decline in the Bay of Biscay.
Entangled dolphins drown within minutes in nets, or suffer injuries from lines and hooks that cause slow death from infection.
Acoustic deterrents (pingers) on nets reduce porpoise bycatch by up to 90% but have limited effect on some dolphin species.
Mediterranean monk seal, Maui dolphin, and Hector's dolphin face extinction risk from chronic bycatch at unsustainable levels.

Welfare Considerations

Dolphin bycatch mortality causes acute welfare harm to animals with cognitive complexity comparable to great apes. Entangled dolphins experience drowning — the combined terror and physical suffering of a socially complex mammal unable to surface for air. The scale is enormous: hundreds of thousands of individuals annually. Solutions exist — pingers, seasonal closures, gear modifications, and mandatory observer coverage — but require political and economic will to implement. Consumer choice and advocacy for fisheries reform are the most accessible levers for reducing this welfare harm.

What You Can Do

Choose seafood certified by dolphin-safe fishing programmes with verified bycatch reduction monitoring.
Support campaigns for mandatory acoustic deterrent requirements on fishing gear in high-dolphin-encounter areas.
Advocate for seasonal fishery closures in critical dolphin habitat during vulnerable periods.
Donate to marine mammal bycatch research developing more effective and targeted deterrent technologies.