problem faced by fishes 

-----  water is getting less
-----  water is getting polluted
 ----- splitting of oil on water
        chemical waste dumped in clean water
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THe waters in rivers, seas and oceans are getting more polluted due to human activity. According to a report by the SSCS (Sea Shepherd Conservation Society) almost one milllion fish species are facing extinction. In one year SSCS saved the lives of 50% of the ocean's whales by taking action against japanese whalers.

The rivers are polluted mainly due to rural activity, like shortage of water and washing clothes.
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