Zoo Hippopotamus Welfare and Aquatic Needs

How zoos meet the aquatic behavioral needs of hippos and support conservation of this vulnerable species.

Key Facts

Hippos spend up to 16 hours per day submerged in water to thermoregulate and protect their sensitive skin
Common hippo populations have declined significantly due to habitat loss and hunting for ivory teeth
Zoo hippos require large, deep pools with heated water and dry resting areas that simulate riverbank habitat
Hippos are highly territorial and aggressive, requiring careful social management in captivity
Their skin secretes a reddish natural sunscreen that requires water and mud access to function properly
AZA hippo breeding programs coordinate genetic management of this vulnerable species

Welfare Considerations

Hippo welfare in captivity centers on meeting their extreme dependence on water. Animals denied adequate pool access develop skin problems from the inability to produce and distribute their natural skin secretions, overheat, and show stereotypic behaviors indicating chronic stress. Modern zoo hippo exhibits provide large heated pools, mud wallows, and terrestrial areas that allow animals to cycle through their natural behavioral repertoire. Conservation value is genuine given declining wild populations, but must be paired with genuine field conservation addressing habitat loss and illegal hunting.

What You Can Do

Support organizations protecting hippo habitat along African river systems
Visit zoos with accredited hippo programs featuring welfare-positive aquatic environments
Advocate against illegal hippo tooth trade, which drives hunting pressure on wild populations
Donate to African Wildlife Foundation programs protecting hippo populations