Which is the water body that separates Europe from Asia?

Europe and Asia are separated by an imaginary line North/South Line from the Arctic Ocean through the Ural Mountains, to the Caspian Sea. From the Caspian Sea the line follows the Caucasus Mountains into the Black Sea.

From the Black Sea it thenfollows a line through the Straits of Mamara, and the Bosphorus, into t he Aegean Sea (Mediterranean Sea. Where upon it has a triple point between Asia, Africa, and Europe.