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  • Not only were cichlid affected, blue-green algae also got affected. The blue-green algae got out out of control and started growing rapidly, cichlids eat this algae but because of the Nile Perch the algae started growing a lot. The algae mad the water very murky, which was another problem for the cichlids because they could not see well enough to mate and reproduce.
  • The algae that was rotting in the water decreased the amount of oxygen in it, which cause even more fish to suffocate and die and fall to the bottom . That just made things worse because when the dead fish fell to the the bottom they rot which deprives more oxygen. Organisms that require little oxygen thrived(Pawns), which is what the Nile Perch fed on.
  • Later, another invader called the hyacinth floated down the Kagera River onto the shoreline of Lake Victoria. By 1996 it had almost 90% of the shoreline of Lake Victoria, which they blocked the sunlight and removed oxygen from the water. That made the fish hard to breed. To add onto the problems, fishing boats could not get through the thick plants and they also harbor snakes, snails, and mosquitos. Which the snails and mosquitoes spread diseases like malaria.
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