Keeping cetaceans including dolphins, belugas, and orcas in captivity is increasingly controversial given evidence of poor welfare and the complex needs of these animals.
The welfare case against keeping cetaceans in captivity is strong. Orca in aquaria have vastly shortened lifespans, collapsed dorsal fins indicating poor welfare, stereotypic behaviour, and in several documented cases turned on trainers. The cognitive complexity of cetaceans means the deprivation of captivity is profound. The shift in public opinion following films like Blackfish has driven commercial and regulatory change. Most welfare scientists agree that large cetaceans cannot have their welfare needs met in captive settings.