Sea otters are keystone species in kelp forest ecosystems whose welfare and conservation directly supports the wellbeing of entire marine communities.
Sea otter welfare is intertwined with ecosystem health in ways that affect millions of other animals. When otters are abundant, kelp forests thrive, providing habitat for hundreds of fish species, invertebrates, and the birds and marine mammals that feed on them. Oil spills cause acute suffering and death as hypothermia sets in when fur insulation fails. Commercial shellfish fisheries compete with otters, sometimes resulting in illegal killing. The keystone role of sea otters means their welfare investment creates cascading benefits throughout coastal marine ecosystems, making them one of the highest-leverage welfare and conservation priorities in coastal California and other regions.