Zoo Pacific Walrus Welfare | Animal Welfare Hub

Pacific walruses are massive, highly social marine mammals whose complex social structure, physical size, and specialised habitat requirements create exceptional welfare challenges in zoo and aquarium settings.

Key Facts

Pacific walruses (Odobenus rosmarus divergens) can weigh up to 1,700 kg and require vast haul-out areas with access to deep water for diving and feeding
Wild walruses are highly gregarious, haul out in groups of thousands, and maintain complex social hierarchies dominated by large tusked males
Walruses use their sensitive vibrissae (whiskers) to detect and consume benthic invertebrates including clams, snails, and worms at depth
Very few zoos worldwide maintain Pacific walruses; most walrus exhibits hold Atlantic walruses in smaller numbers
Captive walruses require regular dental care for their tusks, which can cause significant problems if damaged or impacted
Training walruses for voluntary husbandry behaviours including blood draws, ultrasound, and dental examination reduces stress during veterinary procedures
Arctic warming is reducing sea ice haul-out sites, causing walrus welfare harm through crowding and calf crushing at terrestrial haul-outs

Welfare Considerations

The welfare of walruses in captivity depends fundamentally on scale — these are animals built for vast sea ice haul-outs and deep-water foraging that cannot be replicated in any zoo setting. Facilities that maintain walruses must commit to the largest possible pool areas, enriched foraging opportunities using puzzle feeders containing invertebrate-type food items, and social groupings that reflect natural hierarchy. Operant conditioning for voluntary husbandry behaviours is particularly important for walruses given their size and the difficulty of veterinary examination under restraint. The primary welfare concern for wild Pacific walruses is now climate-driven: loss of sea ice haul-outs causes population-level welfare harm through calf crushing events at overcrowded terrestrial haul-outs.

What You Can Do

Support climate action policies that protect Arctic sea ice habitat for walruses and other ice-dependent species
Donate to World Wildlife Fund or Pacific Environment for walrus conservation and sea ice protection
Advocate for large minimum pool and haul-out standards in aquarium and zoo licensing for walruses
Engage with aquarium education programmes about walrus ecology and climate threats
Reduce your carbon footprint to contribute to the systemic change needed to protect Arctic ecosystems