Sea lions face welfare threats from fishing gear entanglement, harassment during tourist encounters, and prey depletion driven by climate change.
Sea lion welfare encompasses both individual and population-level dimensions. Individual welfare crises — entanglement injuries, domoic acid seizures, gunshot wounds from fishermen — are acute and visible; rehabilitation organisations address these directly through rescue, treatment, and release. Population-level welfare harms are more diffuse: prey depletion from warming seas causes chronic nutritional stress, suboptimal body condition, and reduced pup survival across entire populations. Entanglement prevention — through monofilament recycling, fishing gear modifications, and packing band bans — addresses a major source of individual suffering. Harassment reduction at haul-out sites protects the rest periods that sea lions need for thermoregulation and pup nursing.