California sea lions and other species face welfare challenges from fishery entanglement, domoic acid poisoning, and hunting pressure in some range states. Their recovery demonstrates conservation success and ongoing challenges.
Sea lion welfare involves both acute and chronic welfare challenges. Domoic acid poisoning causes seizures, disorientation, and sometimes permanent neurological damage — affected sea lions wash ashore in distress and require intensive rehabilitation. Entanglement in crab pot lines and trawl nets causes injury ranging from minor lacerations to amputated flippers and drowning. The conflict between sea lion predation on endangered salmon runs and sea lion welfare and conservation status creates difficult management decisions. Non-lethal deterrents are increasingly used but not always effective. Marine mammal rehabilitation centers play a critical welfare role, with California sea lions having particularly high rehabilitation success rates due to their resilience and adaptability.