Harbor seals are popular zoo animals with complex environmental and behavioral needs. Pool design, diet, social management, and enrichment all significantly affect their welfare in captivity.
Harbor seal welfare in zoos depends critically on pool quality, diet variety, and appropriate social management. Pool water quality must be maintained at high standards: chronic eye disease from poor water quality causes pain and progressive vision loss in affected animals. Adequate pool depth and area allow natural swimming patterns and thermoregulation. Seals that are chronically fed monotonous diets develop nutritional deficiencies; variety across fish species maintains nutritional balance and behavioral engagement. Social groupings require monitoring — while some social tolerance is normal, aggression between incompatible animals requires management. Positive reinforcement training programs that build voluntary cooperation with health checks allow non-invasive monitoring and intervention without capture stress.