Narwhals are among the most specialised Arctic cetaceans, with extreme sensitivity to environmental disturbance and sea ice loss. Their welfare is directly threatened by climate change, shipping noise, and industrial development in their limited range.
Narwhals show extreme fright responses to disturbance — including cardiac slowing combined with intense swimming effort — that researchers describe as a paradoxical fear response with significant physiological cost. Ships entering previously ice-covered narwhal habitat cause mass flight events that disrupt feeding and can strand animals. The welfare impacts of climate-driven habitat loss are compounding: reduced sea ice exposes narwhals to more predation, more shipping, and loss of the under-ice ecosystems they depend on for winter foraging. Unlike more adaptable cetaceans, narwhals have limited capacity to adjust their range or behaviour in response to rapid environmental change, making climate mitigation the most critical welfare intervention.