Humpback whales have made a remarkable conservation recovery, but welfare threats from entanglement, ship strikes, and noise pollution persist. Understanding these threats informs protective action.
Entanglement is one of the most welfare-significant threats to humpback whales. An entangled humpback may drag fishing gear for months, causing severe drag exhaustion, wound infections, and starvation. Documented cases show emaciated, severely compromised individuals that survive entanglement for extraordinary periods before being disentangled or dying. Ship strikes cause blunt force trauma and propeller lacerations that may be instantly fatal or cause slow death from injuries. Noise pollution from shipping, seismic surveys, and sonar disrupts the complex acoustic communication and mother-calf bonding that is central to humpback social life.