The Karadeniz, or Black Sea, is a large inland sea located between southeastern Europe and western Asia. It is bordered by six countries: Turkey, Bulgaria, Romania, Ukraine, Russia, and Georgia. The sea is known for its unique ecosystem, which includes various species of fish and marine life, as well as its deep, anoxic waters that are rich in hydrogen sulfide. The Karadeniz plays a significant role in regional trade and transportation, serving as a crucial route for shipping goods between Europe and Asia. Its coastal areas are popular for tourism, offering beautiful landscapes, beaches, and cultural experiences. The sea also has historical significance, having been a vital area for ancient civilizations and trade routes.