Sea otters are keystone species of North Pacific kelp forest ecosystems whose welfare and ecological role are deeply intertwined — their protection benefits entire marine communities.
Sea otter welfare is intimately connected to their extraordinary energetic demands. As non-blubber-insulated marine mammals, sea otters must constantly balance heat loss with food intake — any food shortage or fur contamination triggers rapid deterioration. Oil spills cause acute welfare crises: contaminated otters cannot insulate effectively and die from hypothermia within hours unless captured and cleaned. Pregnant and pup-rearing females face the highest welfare vulnerability — they must feed themselves while nursing and carrying pups. The psychological welfare of pup-rearing females is evident in the intense bonding behavior observed between mothers and pups. Stranded pup rescue and rehabilitation programs run by Monterey Bay Aquarium address welfare crises at the individual level.