evidence: Lake Malawi (also known as Lake Nyasa in most countries, or Lake Nyassa, Lake Niassa, or Lago Niassa in Mozambique), is an African Great Lake and the southmost lake in the Great Rift Valley system of East Africa. This lake, the third largest in Africa and the eighth largest lake in the world, is located between Malawi, Mozambique, and Tanzania. [...] The Nyasa (Nyasa means "lake") is located at the south-west of Tanzania, The lake lies in three countries' territory; Tanzania and Malawi. However, it is bordered by three countries, Tanzania, Malawi and Mozambique. It is the third largest in Africa (after Lake Victoria and Lake Tanganyika) with 550 kilometers length and 75 kilometers width, covering an area of more than 11,400 square kilometers. In some parts, the lake is as deep as 700 meters.