Nile tilapia
Because of the introduced Nile perch ("Lates niloticus"), Nile tilapia ("Oreochromis niloticus"), and water hyacinth, deforestation that led to water siltation, and overfishing, many Lake Victoria cichlid species have become extinct or been drastically reduced. By around 1980, lake fisheries yielded only 1% cichlids, a drastic decline from 80% in earlier years.