Lake Tanganyika is the longest freshwater lake in the world. It is the second largest lake in the world barley getting beat by Lake Bailkal in Siberia. Lake Tanganyika is a part of a lake chain in the Great Rift Valley. The lake is 410 miles (660 kilometers) long. Tanganyika has a depth of 4,710 feet (1,426 meters). The lake separates Tanzania from the Democratic Republic of the Congo (formly Zaire). A county north of the lake is Burundi and to the south is Zambia. A lot of rivers flow into Tanganyika but its only outlet is the Lukuga River, which flows into the Lualaba (which then becomes the Congo) River. Tanganyika then finally flows into the Atlantic Ocean.The principal ports or main ports are the Kigoma-Ujiji in Tanzania, Bujumbura in Burundi, and the Kalemie in the Democratic Republic of the Congo. Lake Tanganyika is an African Great Lake. Some of the major rivers that flow into Lake Tanganyika are Ruzizi River formed over 100,000 years ago, the Malagarasi River which is Tanazania's second longest river. The lake is home to at least 250 cichlid fish and 75 non-cichlid fish. The lake is domonatied by 6 main fish. Two of those fish being Tanganyika saradines and the other four being types of predatory Lates(which are simialar to the Nile Perch). The lake has 68 freshwater snail species. The lake is a very important fishing part for the locals. They get 25-40% of all their protein from Lake Tanganyika. The lake was a major scene for two major battles in World War 1. Germany gained control of the lake for the early part of the war. The Royal Navy from Great Britain gained control towards the middle of the war by sinking the German's war boats.