The lake shared by four African countries—Zambia, Zimbabwe, Mozambique, and Tanzania—is Lake Tanganyika. It is one of the deepest and oldest lakes in the world, playing an important role in the local ecosystem and economy. It is also renowned for its unique biodiversity, hosting over 350 species of fish, mainly endemic to its waters. This characteristic makes it vital for scientific research and conservation efforts. The lake is bordered by four countries, providing various cultural influences and economic interactions through fishing and trade.