Harbor Porpoise Bycatch Welfare Crisis

Harbor porpoises are among the most frequently bycaught cetaceans in gill net fisheries, with thousands dying annually in preventable entanglement that causes acute suffering before death.

Key Facts

Harbor porpoises are the most common cetacean in many European coastal waters but face significant bycatch mortality
An estimated 5,000-7,000 harbor porpoises die annually as bycatch in the North Sea alone
Entanglement in gill nets causes drowning — porpoises cannot surface to breathe and asphyxiate within minutes
Acoustic deterrents called pingers, which emit sounds near gill nets, have been shown to reduce porpoise bycatch by up to 70%
EU regulations require pinger use on bottom-set nets in designated areas but compliance and enforcement vary
Harbor porpoise populations in the North Sea and Baltic are showing concerning decline trends partly attributable to bycatch

Welfare Considerations

Harbor porpoise bycatch causes acute, prolonged suffering as entrapped individuals drown. The asphyxiation process — struggling against the net while unable to surface — can take several minutes of intense physiological distress. The scale of this welfare harm across thousands of individuals annually makes it one of the most significant cetacean welfare issues in European waters. Critically, effective prevention technology exists — acoustic pingers that alert porpoises to net presence reduce bycatch substantially. The barriers are compliance, cost, and inadequate enforcement rather than technical limitations. Consumer choices around seafood from pinger-compliant fisheries and advocacy for stronger enforcement of existing regulations are direct ways to reduce this preventable welfare harm.

What You Can Do

Choose seafood from fisheries certified to use porpoise-safe fishing gear including mandatory pinger compliance
Advocate for stronger enforcement of pinger use requirements in gill net fisheries in your region
Support organizations working on cetacean bycatch reduction technology and policy
Engage with seafood retailers about their sourcing requirements for bycatch mitigation
Follow harbor porpoise population monitoring and support conservation organizations working on their protection
Share information about harbor porpoise bycatch to build public awareness of this preventable welfare crisis