Pesticides are widely used to protect crops from pests, ensure food security, and increase agricultural productivity. However, the application of these chemicals can lead to unintended adverse effects on non-target aquatic organisms. This scientific manuscript provides a comprehensive review of the acute and chronic effects of pesticides on aquatic non-target organisms, focusing on their behavior, physiology, reproductive success, and populations dynamics. Understanding these effects is critical to developing effective strategies to minimize the ecological risks associated with pesticide use.