Hippos are highly specialised semi-aquatic animals with profound welfare needs that are often difficult to meet in captivity. Water access, social structure, and space requirements present major challenges for zoo management.
The welfare challenges of captive hippos centre on water, space, and social management. Insufficient pool depth prevents thermoregulation and normal postural behaviours. Skin disease from inadequate submersion is both painful and difficult to treat. Social management requires careful attention: hippos forced into incompatible groupings suffer aggression-related wounds, while isolated individuals show stereotypies and elevated stress hormones. Modern hippo exhibits with deep pools, varied substrate, and appropriate social groupings significantly improve behavioural repertoire and health outcomes.