How are cruise ships a threat to the ocean?

Cruise ships pose several threats to the ocean, primarily through pollution and ecological disruption. They release large amounts of wastewater, sewage, and pollutants directly into marine environments, which can harm aquatic life and degrade water quality. Additionally, their anchors can damage sensitive coral reefs, and the large volume of tourists can lead to overfishing and habitat destruction in popular destinations. Collectively, these factors contribute to the decline of marine ecosystems and biodiversity.