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.