The impact of agricultural runoff on aquatic ecosystems is significant and often harmful. Runoff can carry fertilizers, pesticides, and sediments into rivers and lakes, leading to problems such as eutrophication and habitat degradation. Eutrophication can cause excessive algal blooms, which deplete oxygen levels in water bodies, harming fish and other aquatic life. Additionally, pollutants can disrupt aquatic food webs and lead to bioaccumulation in wildlife. Addressing agricultural runoff through sustainable practices is essential for protecting water quality and preserving aquatic ecosystems.