As part and parcel of all marine ecosystems, jellyfish are supposed to have been around for nearly 500 million years now. Some people say 700 million years, but the main idea is that they are some of the oldest inhabitants of this world.
Resembling a floating umbrella made of a gelatinous material, jellyfish can grow to impressive sizes, and some of them have bells that are as much as two meters tall.
Depending on the species, some jellyfish live for only a few hours, while others swim about in our oceans for several months.
As shown in this video, ocean currents tend to gather up these marine creatures, thus leading to the formation of live-marine-clouds.
Unfortunately, the destruction of our oceans might soon take its toll on our planets jellyfish population.