Orcas in marine parks show dramatic welfare deficits compared to wild counterparts, including collapsed dorsal fins, shortened lifespans, abnormal behaviors, and violent incidents with trainers.
Orcas are among the most cognitively and socially sophisticated animals on earth. Wild orcas live in matrilineal family groups with stable relationships lasting decades, engage in complex cooperative hunting, and transmit culturally learned behaviors across generations. In marine park tanks, these capabilities cannot be expressed. The compression of natural habitat from hundreds of miles of ocean to a tank the size of a large swimming pool is associated with unmistakable welfare compromise — visible in collapsed fins, stereotypic behaviors, and dramatically shortened lives. The welfare case against orca captivity is among the strongest in animal science.