How does water pollution affect population of animals

If humans don't start picking up trash out of the ocean more and more fish will die but if we start cleaning up after our selfs we will be better off for the planet and not anger this little guy any more

Also we need to keep the swaps clean and are wet lands safe because 65% of all food chains start here if we don't keep our wet lands and waters clean. There will be a huge price to pay.