Entanglement in fishing gear is the leading human-caused welfare harm to humpback whales globally. Thousands of whales become entangled annually — many die slowly; others carry gear for months before eventually succumbing to injuries.
Humpback whale entanglement causes prolonged, severe suffering. Ropes cutting through blubber and muscle create infected, gangrenous wounds that progressively weaken the animal. Entangled whales show abnormal posture, reduced dive depths, and impaired feeding — a welfare crisis unfolding over weeks to months before death. Disentanglement response, while heroic, reaches only a fraction of affected animals in accessible locations. Prevention through gear modification — ropeless fishing technology, weaker links that break under whale force, and seasonal fishing closures in high-entanglement areas — is the only scalable solution. Consumer seafood choices that support fisheries adopting entanglement-reducing gear create market incentives for the transition.