Black Sea

The Black Sea is a sea in Eurasia between Europe, Caucasus, and Anatolia. Many rivers flow to the Black Sea, including the big rivers, the Don, Danube, Dniester and Dnieper.

It is connected to the Atlantic Ocean through the Bosphorus strait, the Sea of Marmara, the Dardanelles strait, the Aegean Sea, the Mediterranean Sea and the Strait of Gibraltar. 90% of the sea has no oxygen. The water is saltwater but less salty than the ocean. During the last ice age, the Black Sea was a freshwater lake.