Explanation:

Mediterranean Sea, Black Sea, Caspian Sea, Aral Sea

The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant. 

The Black Sea is a marginal sea of the Atlantic Ocean lying between Europe and Asia; east of the Balkans in Southeastern Europe, south of the East European Plain in Eastern Europe, west of the Caucasus, and north of Anatolia in Western Asia.

The Caspian Sea is the world's largest inland body of water, variously classed as the world's largest lake or a full-fledged sea.

The Aral Sea, was an endorheic lake lying between Kazakhstan and Uzbekistan which began shrinking in the 1960s and had largely dried up by the 2010s.