Lake Malawi Africa's third-largest lake by area and the southernmost of the great Rift Valley lakes, its wedged between the nations of Malawi, Tanzania and Mozambique. Fed by the Ruhuhu River, a tributary of the Zambezi. Lake Malawi contains hundreds of species of endemic fish, especially cichlids. The northern, deepest portions are bounded by the forested Livingstone Mountains to the east and Nyika Plateau and Viphya Highlands to the west. Its southern and western shores are heavily populated. Lake Malawi provides profitable transportation routes for both passengers and cargo. Ships run mostly by railway companies carry cotton, rubber, tobacco, tea, rice, tung oil, and peanuts for export. Fourteen rivers feed Nyasa. The largest is the Ruhuhu. The only outlet is the Shire River to the south, a tributary of the wide Zambezi flowing to the Mozambique Channel.Lake Nyasa, also called Lake Malawi, lake, southernmost and third largest of the EAST African Rift Ralley lakes of East Africa, lying in a deep trough mainly within Malawi. The lake’s middle line and its northern and eastern shores form much of Malawi’s boundary with Tanzania andMozambique. Its north-south length is 363 miles (584 km); its width varies from 10 to 50 miles (16 to 80 km); and its area is 11,430 square miles (29,604 square km). The surface of the lake is 1,550 feet (472 metres) above sea level, and the depth increases to 2,310 feet (704 metres) toward the northern end, where the forested Livingstone Mountains to the east and the Nyika Plateau and Viphya Mountains to the west fall precipitously down to the lakeshore.The goverment is not fighting over water rights.