Human activities like plastic waste disposal, oil spills, and industrial runoff contribute significantly to ocean pollution. Chemicals and plastics harm marine life by causing physical injuries, poisoning, or disrupting ecosystems. For instance, microplastics ingested by fish affect the food chain, while oil spills devastate habitats. Ocean pollution also threatens livelihoods dependent on fishing and tourism. Solutions include waste reduction, stricter regulations, and promoting sustainable practices to protect marine ecosystems.