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Photo: Emekur, CC BY-SA 4.0 via Wikimedia Commons
The river is home to 36 freshwater fish families and almost 250 species, including 20 that are only found in Nigeria. The river Niger flows from Lokoja, in the lower portion of the country, through Agenebode-Ida, to Forcados in the delta, then to the Nun River in the rivers, and on.
The Niger River is the main river of West Africa, extending about 4,180 kilometres. Its drainage basin is 2,117,700 km2 (817,600 sq mi) in area. Its source is in the Guinea Highlands in south-eastern Guinea near the Sierra Leone border. It runs in a crescent shape through southwest Mali and through southwest Niger, on the border with Benin, and then through Nigeria, discharging through a massive delta, known as the Niger Delta, into the Gulf of Guinea in the Atlantic Ocean. The Niger is the 14th-longest river in the world, and the third-longest river in Africa, exceeded by the Nile, and the Congo River. Its main tributary is the Benue River.
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