Marine mammals in aquatic facilities face specific welfare challenges. Modern welfare standards focus on social grouping, cognitive enrichment, and reducing learned helplessness from overly controlled environments.
Marine mammal welfare in aquatic facilities sits at the center of ongoing ethical debate. For some species — sea lions, smaller cetaceans in large, complex facilities — welfare outcomes can be reasonable. For large cetaceans like orcas, the evidence consistently shows that captivity causes severe welfare compromise regardless of facility quality: the spatial, social, and cognitive needs of these animals cannot be met in any human-designed structure. Dolphins in smaller tanks show stereotypic behaviors and shortened lifespans. The growing consensus in marine mammal science is that certain species are simply incompatible with captive conditions, however well-resourced.