The keeping of dolphins, orcas, and other cetaceans in captivity is one of the most contentious animal welfare debates. Understanding the evidence helps form an informed view on this complex issue.
The captive cetacean debate involves genuine welfare tensions. Large cetaceans like orcas appear particularly poorly adapted to pool captivity - the mismatch between their natural ranges and pool dimensions, their complex social needs, and evidence of psychological distress (stereotypic behaviors, aggression) collectively present a strong welfare case against traditional pool captivity for these species. Smaller species like bottlenose dolphins show somewhat better adaptation to captivity when excellent care is provided. The emergence of sea sanctuary models - large natural sea-pen environments - represents a potentially welfare-positive alternative to both traditional captivity and potentially impossible release for long-captive animals. The evidence does not support a simple answer for all cetacean species.