Humpback whale populations have recovered substantially from commercial whaling, but individual welfare remains affected by entanglement in fishing gear, vessel strikes, and the chronic noise of increasingly busy oceans.
Entanglement in fishing gear is the welfare challenge that most directly affects individual humpback whales alive today. A humpback entangled in crab pot lines, trawl nets, or shark nets may carry gear for weeks or months before death or disentanglement. The gear cuts into skin and underlying tissue, causing progressive wound infection, weight loss from impaired feeding, and the physical burden of dragging heavy equipment. Disentanglement teams - operated by NOAA and equivalent agencies in other countries - perform dangerous, technically complex rescues that save individual whales but reach only a small fraction of those entangled. Vessel strikes cause immediate severe trauma - a humpback struck by a large ship may be fatally injured but survive for hours or days before death.