Very typical of news reports to sensationalize and promote inaccurate information. The situation seems to be focused on the fishing industry as it pertains to large food fish, such as the Nile Perch and Tilapia. That, of course, would be serious, should it happen, for all the people who rely on such food fish.
However, to say that all the fish of Lake Victoria will be eradicated 3 years from now is a balled faced lie. Many Lake Victorian Haplochromis are thriving now and will continue to do so in various ways and means. Their numbers may even increase with the Nile Perch being greatly reduced in numbers.