The Caspian region refers to the area surrounding the Caspian Sea, the largest enclosed inland body of water in the world. This region includes parts of five countries: Kazakhstan, Russia, Azerbaijan, Iran, and Turkmenistan. The Caspian Sea is known for its unique biodiversity and is home to various species, including the famous Caspian seal. Economically, the Caspian region is significant due to its rich natural resources, particularly oil and natural gas. The surrounding countries engage in various energy projects and trade, making the region strategically important for energy supply and geopolitical interests.