Marine debris entanglement causes severe injury and death in California sea lions — a preventable welfare crisis driven by abandoned fishing gear and plastic waste.
Sea lion entanglement inflicts prolonged, severe suffering. Animals caught in constricting loops may carry them for months or years as wounds deepen and become infected. Rescue is logistically difficult — animals must be tranquilized at sea or approached on land — and many entangled animals are never successfully treated. The welfare impact extends beyond individual animals: chronic pain, impaired swimming, and reduced foraging efficiency contribute to poor body condition and mortality. Prevention through fishing gear retrieval programs, ghost gear removal, and plastic waste reduction is far more effective for sea lion welfare than relying on reactive rescue operations.