Hippopotamus welfare in zoos requires management of their aquatic behavioral needs, social complexity and the welfare implications of their highly territorial and potentially dangerous nature.
Hippopotamus welfare management requires facilities centered on adequate aquatic access, as hippos evolved for semi-aquatic life and cannot meet thermoregulatory and skin health needs without appropriate water access. Pool size must accommodate hippo swimming and underwater movement. Social management challenges arise from the extreme territorial aggression of dominant males — group composition and space management are critical to preventing welfare-compromising conflict. Positive reinforcement training for voluntary veterinary examination is increasingly used to reduce the stress of medical management for these large, potentially dangerous animals. Conservation significance of zoo hippo populations is growing as wild populations decline.