Pollution can have various negative impacts on aquatic ecosystems. It can lead to a decrease in water quality, which can harm aquatic plants and animals. Pollutants such as chemicals, plastics, and heavy metals can disrupt the balance of the ecosystem, leading to reduced biodiversity and the decline of certain species. Additionally, pollution can contribute to the development of dead zones where oxygen levels are too low to support marine life. Overall, pollution can result in long-lasting damage to aquatic ecosystems, affecting both the environment and the organisms that depend on it.