Sea lions are frequently entangled in fishing gear, plastic debris, and monofilament line; entanglement causes severe lacerations, growth restriction, and death without intervention.
Entangled sea lions experience chronic pain from lacerations that deepen as the animal grows. Animals with constricting debris around their necks slowly suffocate or develop infected wounds over weeks to months before rescue or death. Marine rescue organizations that remove entanglements and rehabilitate injured animals provide critical individual welfare interventions, but prevention through reducing fishing gear and plastic pollution is the primary solution.