What are the effects of waste from cruise ships on aquatic life?

Waste from cruise ships can have detrimental effects on aquatic life, primarily due to the discharge of sewage, food waste, and hazardous materials. Sewage can introduce pathogens and nutrients that lead to algal blooms, which deplete oxygen levels and harm marine organisms. Additionally, toxic substances from cleaning agents and oil can accumulate in the water, posing risks to fish and other wildlife. Overall, such pollution disrupts marine ecosystems and can lead to loss of biodiversity.