Sea otters recovering from near-extinction face ongoing threats from oil spills, shark predation, fishing gear entanglement, and infectious disease.
Sea otters bitten by sharks experience severe wounds that may not be immediately fatal, causing prolonged pain and disability. Oil-contaminated sea otters lose the insulating properties of their fur, suffering hypothermia in cold Pacific waters. Entanglement in crab and fishing pot lines causes drowning. Infectious diseases including toxoplasmosis from cat faeces in terrestrial runoff cause neurological disease and death. Otters in stranding programs require intensive rehabilitation including rehydration, warming, and fur cleaning over weeks to months.