Черноморский дельфин?

Лагерь «Орленок». Dolphins are the only whales occurring in the Black Sea: they are small-sized toothed whales (as compared to their relatives such as sperm-whale or orca). At the same time, they are the largest marine animals in the Black Sea. Dolphin are not fish, they are mammals - which means they are viviparous and feed their calves with milk, and they use lungs to breathe air. To breath they have to coming up to the surface; at those moments we see their backs emerging among waves, and often can hear sounds they produce exhaling the used air.