Humpback whales have recovered dramatically since commercial whaling ended. Understanding their current welfare threats helps sustain this conservation success story.
Recovered humpback whale populations still face significant individual welfare challenges. Entanglement in fishing gear — particularly crab pot lines, gill nets, and longlines — causes some of the most prolonged suffering documented in any wild animal. Entangled whales may drag gear for months, experiencing progressive debilitation from restricted movement, starvation, and infection from line cuts. Rope entanglement around the jaw prevents feeding; tail entanglement causes swimming impairment and exhaustion. Rapid response whale disentanglement teams save individual whales and gather critical data on entanglement patterns. Ship strikes at speeds above 10 knots cause fatal trauma; voluntary speed reduction zones in migration corridors significantly reduce lethal collision rates.