Killer whales in captivity have been the subject of intense welfare debate. Wild orcas also face welfare threats from pollution, prey depletion, and acoustic disturbance.
The captive orca welfare case is one of the most clearly documented in animal welfare history. The combination of severely shortened lifespan, ubiquitous dorsal fin collapse, stereotypic behaviour, and well-documented psychological distress provides compelling evidence that orcas cannot have adequate welfare in tank environments. The wild orca welfare situation is less visible but equally serious for the most endangered populations: Southern Resident killer whales face chronic nutritional stress from depleted salmon runs, acoustic stress from vessel traffic, and contamination from persistent organic pollutants accumulated in their blubber. Both captive and wild orca welfare require active intervention — ending captive programs and addressing the salmon depletion and acoustic disturbance threatening wild populations.