Humpback whale entanglement in fishing gear is a growing welfare crisis requiring coordinated international responses, with dedicated disentanglement teams working to free whales from life-threatening rope and net entanglements.
Entanglement in fishing gear causes protracted and severe suffering that may continue for months. Rope cutting into blubber and flesh causes open wounds that become infected; the constant drag of attached gear exhausts animals that cannot rest, feed normally or migrate effectively. Humpback whales documented dragging gear show progressive body condition decline — visible in photographs as a widening gap between the dorsal fin and back (the "peanut head" appearance indicating starvation). The psychological dimension is difficult to assess but behavioural observations suggest entangled whales show signs of distress and modified behaviour. Disentanglement by trained responders is life-saving when possible but is constrained by logistics, weather and whale behaviour. Many entanglements resolve through wire cutting by the whale itself, often after severe injury. The scale of entanglement — with the majority of North Atlantic humpbacks showing scars — represents one of the most significant individual animal welfare crises in the ocean.