Overfishing, water shortages and pollution—these are just some of the environmental problems Lake Victoria has been facing over the last few decades. Bordered by Kenya, Tanzania and Uganda, the world's second largest freshwater lake provides the main source of income for the populations living around the Lake Victoria basin. However, the environmental pressures put on the lake have seriously compromised fish farmers' livelihoods.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/making-fish-farming-in-eastern-africas-lake-victoria-sustainable