Which African Great Lake is the world's longest freshwater lake?

Which African Great Lake is the world's longest freshwater lake? Lake Tanganyika.

Lake Tanganyika is the world's longest freshwater lake, stretching roughly 420 miles (676 kilometres) from north to south in the East African Rift. It is shared by Tanzania, the Democratic Republic of the Congo, Burundi, and Zambia, making it an international lake as well as one of Africa's Great Lakes.

Its elongated basin formed through tectonic rifting, as the African Plate gradually pulled apart. The lake is also exceptionally deep: its maximum depth is about 1,470 metres, making it the second-deepest lake in the world after Lake Baikal. Its great depth gives it the world's second-largest freshwater volume, despite its much smaller surface area than Lake Victoria.

Tanganyika drains west through the Lukuga River into the Congo River system. The lake is famous for its extraordinary biodiversity, including hundreds of fish species found nowhere else. Lake Malawi is another long African lake, while Lake Victoria is Africa's largest by surface area; neither is the world's longest freshwater lake.