Sea otters face multiple human-caused welfare threats in coastal environments. Their dependence on pristine fur for insulation makes oil spills particularly devastating, while entanglement in fishing gear causes individual suffering at scale.
Sea otter welfare harms are acutely visible because these are large, charismatic mammals that can be observed struggling at the surface. Oiled otters lose thermoregulation rapidly and die in acute distress from hypothermia and organ failure if not rescued. Entangled otters may drown immediately or survive with severe lacerations that cause prolonged pain and impaired diving ability. Shark bite survivors face weeks of rehabilitation; wounds to the hindquarters can prevent effective swimming and thermoregulatory diving. The welfare of rehabilitated sea otters is complex: long-term release success rates vary, and some individuals become habituated to humans in ways that complicate genuine reintegration. Prevention — reducing oil spill risk and fishing gear entanglement — is the priority welfare intervention.