The welfare of captive dolphins, orcas, and beluga whales has been the subject of intense scientific and public debate. Understanding the evidence helps evaluate the case for sea sanctuaries as an alternative.
The welfare case against keeping large cetaceans in traditional captive facilities is now well-established. Orcas and dolphins are highly intelligent, wide-ranging, socially complex animals whose needs cannot be met in concrete pools regardless of pool size. Collapsed dorsal fins in captive orcas signal muscular and connective tissue changes associated with chronic restriction of movement — a visible welfare indicator that wild populations rarely exhibit. The sea sanctuary model — using netted coastal bays where retired captive cetaceans can experience natural water, tides, and enriched environments while receiving professional care — represents a welfare improvement that does not require release of animals habituated to human care. The beluga whale sanctuary in Iceland is the most advanced example of this model, offering a template for the retirement of other captive cetaceans.