Harbor seals are commonly displayed in marine parks and zoos. Their welfare requires meeting their diving and social needs while managing the significant challenges of keeping semi-aquatic marine mammals in captivity.
Harbor seal welfare in zoological facilities benefits enormously from the widespread adoption of positive reinforcement training. Teaching seals voluntary behaviors — presenting flippers for blood draws, opening mouths for tooth inspection, positioning for ultrasound — eliminates the need for chemical restraint and reduces handling stress dramatically. Pool design is critical: adequate depth for natural diving behavior, clean water maintained to appropriate temperature, and haul-out areas that mimic natural resting habitat. Wild-caught harbor seals in some facilities may experience chronic stress from captivity that born-in-captivity animals do not. Rehabilitation facilities that receive wild animals aim to release rather than permanently display, representing the most welfare-appropriate outcome for wild-origin animals.