How is the meridian sea connected to the Black Sea?

The Meredian Sea is not a recognized body of water; it may be a typographical error. However, if you meant the Mediterranean Sea, it is connected to the Black Sea through the Bosporus Strait, which links the Sea of Marmara to the Black Sea. The Dardanelles Strait further connects the Sea of Marmara to the Aegean Sea, ultimately linking the Mediterranean Sea to the Black Sea. This connection allows for the exchange of marine species and influences the climate and ecosystems of the region.