London: Jellyfish and other gelatinous zooplankton are present throughout the world’s oceans, with the greatest concentrations in the mid-latitudes of the northern hemisphere, showed the scientists who created the world’s first global jellyfish database.

Jelly fish swim near the surface of the Black Sea near the city of Sinop, in northern Turkey. The Black Sea is famous for underwater currents and its cold water. Because of poisenous gas at 200 metres below sea level, there is no ecosystem under that level here. Pic/AFP