The welfare of captive orcas, dolphins, and other marine mammals has been debated intensely for decades. Evidence of psychological harm from captivity has driven policy changes and public opinion shifts.
The welfare costs of cetacean captivity are well-documented: orcas in small pools compared to their wild range of 100-200 km per day, social deprivation from incompatible mixed-species groupings, the psychological impact of performing repetitive shows, and the documented aggression that occurs when incompatible animals are housed together. The ethical case for ending cetacean captivity has persuaded major jurisdictions including Canada, and public support for this position continues to grow. However, the question of what to do with existing captive animals — who cannot be released to the wild — remains complex. Sea sanctuaries that provide larger, natural environments represent a welfare-improving alternative for current captive populations.