The keeping of orca (killer whales) in captivity for entertainment has become one of the most contested animal welfare issues globally. The science of orca welfare in captivity and the conservation implications are both well-developed.
Captive orca welfare represents perhaps the clearest case of fundamental animal welfare needs that cannot be met in any captive facility. These are animals with home ranges of hundreds of kilometers of open ocean, living in societies so complex they have distinct cultures and languages. The behavioral consequences of captivity — collapsed dorsal fins, stereotypy, aggression, early death — are not management failures of individual facilities but inherent consequences of confining these animals to conditions that cannot approximate their ecological and social reality. The moral arc of captive orca is bending toward an end: public opinion has shifted, legislation is changing, and the companies holding captive orca are under sustained pressure to phase out their programs. The welfare of currently living captive orca requires sanctuary sea pen retirement as the most humane transition.