The main problem caused by water pollution is the effect it has on aquatic life. Dead fish, birds, dolphins, and many other animals often wind up on beaches, killed by pollutants in their habitat. Pollution disrupts the natural food chain as well. Pollutants such as lead and cadmium are eaten by tiny animals. The tiny animals are consumed by fish and shellfish which continue to disrupt higher levels of the food chain. Eventually, humans are affected by this process when they consume seafood that has been poisoned. These bodies of water are highly polluted by humans and in result come right back to hurt us.