They lack a brain, a skeleton, and even a heart. And yet for hundreds of millions of years they have been walking their gelatinous bodies in all corners of the ocean, effectively hunting their prey thanks to their "harpoons" and their rhythmic and silent movement . Furthermore, they are one of the few animals that appears to benefit from climate change . In VERY Interesting we invite you to get to know the amazing jellyfish up close with this Multimedia Special .
