evidence: The lake 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. [...] Lake Nyasa is also among the Great Rift Valley’s lakes, which shares some of the characteristics with lake Tanganyika. The lake has a distinctive characteristic: 14 rivers pouring their waters into the lake, and only one river which flows out to the sea, River Shire. [...] Though Lake Nyasa does not receive many tourists, the lake is magnificently attractive and is rich in crocodiles and hippopotamus. For Fish lovers, Lake Nyasa is biologically the most diverse lake, containing approximately 30% of world’s cichlid species (colorful fish which are easily seen in the lake’s clear water).