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1. The Black Sea was given that name because the lack of oxygen in the water prevents the development of microorganisms, making it appear black. 2. It was called the Black sea because it was a Sea of Death.Sailors of long ago, if caught in a storm, usually died because of the absence of islands at which to harbour, and the ferocity of the storms that hit. 3. The intense fogs which develop over the Black sea absorb the light, making the water appear black. 4.t was called the Black sea because it was a Sea of Death. Sailors of long ago, if caught in a storm, usually died because of the absence of islands at which to harbour, and the ferocity of the storms that hit. 3. The intense fogs which develop over the Black sea absorb the light, making the water appear black. 4.
The Black Sea has a positive water balance; that is, a net outflow of water 300 km 3 (72 cu mi) per year through the Bosphorus and the Dardanelles into the Aegean Sea.Mediterranean water flows into the Black Sea as part of a two-way hydrological exchange.he Black Sea is a marginal sea and is the world's largest body of water with a meromictic basin. The deep waters do not mix with the upper layers of water that receive oxygen from the atmosphere. As a result, over 90% of the deeper Black Sea volume is anoxic water.