One reason is that with all the trash and chemicals in the aquatic system it becomes difficult for the marine life to breathe. and they die. Many animals like turtles, feed on garbage as, mistaking for food. The last main reason is when toxic waste harms one organism; it will end up harming a whole food chain of marine life. When people dump waste or spray chemical finally it reaches the aquatic system through storm water or run off. It is washed to the rivers then straight to the waterfalls then go to the oceans polluting marine life that kills corals, aquatic mammals, fishes, sea birds (that eat fish), sea snakes, crustaceans, amphibians, and reptiles (that eats fish and other sea creatures). Oil spills cause the birds feather to clog leading to the death of the organism. The whole food chain along with the ecosystem is finally affected.
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