Harbor Porpoise Bycatch and Welfare

Harbor porpoises are the most frequently killed marine mammals in European fisheries bycatch, with tens of thousands dying annually in gillnets causing significant welfare and conservation concerns.

Key Facts

An estimated 40,000-80,000 harbor porpoises die annually as bycatch in European fisheries
Gillnet drowning is the primary cause — porpoises become entangled and cannot surface to breathe
Drowning takes approximately 4-6 minutes in porpoises — a welfare crisis as well as a conservation issue
Acoustic pingers attached to nets deter porpoises and reduce bycatch by 50-90%
The North Sea and Baltic Sea harbor porpoise populations face bycatch rates exceeding sustainable limits

Welfare Considerations

Harbor porpoise bycatch represents one of the largest-scale marine mammal welfare problems in European waters. Each drowning event involves an intelligent, air-breathing animal experiencing hypoxia and terror over 4-6 minutes before death. The scale — potentially 40,000-80,000 deaths annually in European waters alone — is staggering. Acoustic pinger technology is proven, affordable, and effective at reducing bycatch without significantly affecting fish catch. Regulatory requirements for pinger use exist in some fisheries but are inconsistently enforced. Consumer pressure on retailers to source fish from pinger-equipped vessels would drive widespread adoption.

What You Can Do

Choose fish from fisheries with documented porpoise bycatch reduction programs and pinger use
Support organizations campaigning for universal acoustic pinger requirements in gillnet fisheries
Advocate for stronger enforcement of existing bycatch regulations
Support harbor porpoise population monitoring programs
Raise awareness that fish consumption has direct marine mammal welfare implications