Illegal, Unregulated and Unreported (IUU) fishing has been reported in many publications;_this_research project_provides an overview of the extent of IUU fishing on the African Great Lakes. Stock has been taken of fisheries regulations and legislations in the riparian countries to understand the diversity of the interpretation of illegal fishing operations. A summary has been presented of the regulations governing the target species of the different fisheries. The fisheries management measures have been listed for major fisheries on the three Great Lakes, including the extent of harmonization of the legislations in the bordering nations of each lake. The case of Tanzania is highlighted as it shares the three Great Lakes with its neighbours. The general Tanzanian regulations are applicable to all three lakes and in case the neighbours harmonize their management measures with the Tanzanian ones, then it is evident that Tanzanias role in managing the lakes fisheries resources is crucial. Tanzanias input into the formulation of co-management measures is well recognized. The comparison of the fisheries legislations led to comparison of aquaculture management rules as well. Comparison of the different fisheries regulations shows the efforts still to be made by the countries for harmonization of fisheries management measures and co-management arrangements. Recommendations have been provided to facilitate the harmonization process. The development of pond and cage culture has also been discussed.