Welfare of Animals in Deep Sea Fishing

Deep sea fishing targets species in remote, difficult-to-observe environments, creating welfare concerns about bycatch, barotrauma, and the impact on poorly understood deep sea ecosystems.

Key Facts

Deep sea species like orange roughy and Patagonian toothfish live 50-150 years — making population recovery from overfishing very slow
Barotrauma — organ damage from pressure change during hauling — affects all deep-caught fish
Deep sea trawling destroys cold water coral ecosystems that take centuries to grow
An estimated 90% of some deep sea bycatch species are discarded dead
International waters beyond national jurisdiction have minimal fishing welfare regulation

Welfare Considerations

Deep sea fishing welfare concerns are compounded by scientific uncertainty: the welfare capacity of many deep sea species is unknown, and the ecosystem impacts of deep sea fishing on unknown biodiversity are poorly characterized. Barotrauma during hauling causes internal organ rupture and swim bladder expansion — likely painful experiences for fish capable of nociception. The slow recovery rates of deep sea populations make welfare harms persistent beyond the individual level.

What You Can Do

Avoid deep sea fish species listed as unsustainable by Monterey Bay Aquarium Seafood Watch
Support high seas treaty negotiations including protections for deep sea ecosystems
Advocate for deep sea fishery closure in international waters pending better ecological assessment
Donate to Deep Sea Conservation Coalition campaigns for deep sea trawling bans