A crocodile enters Kariba Lake in Zimbabwe - photo by @shaulschwarz - Lake Kariba was filled between 1958 and 1963 following the completion of the Kariba Dam , it is the world's largest man-made lake and reservoir by volume. Before Lake Kariba was filled, the existing vegetation was burned, creating a thick layer of fertile soil on land that would become the lake bed. As a result, the ecology of Lake Kariba is vibrant. A number of fish species have been introduced to the lake, notably the sardine-like kapenta (transported from Lake Tanganyika), which now supports a thriving commercial fishery. Other inhabitants of Lake Kariba include Nile crocodiles and hippopotami.