The jelly phenomenon: what you didn't know about jellyfish can sleep without a brain, look at trees under water and turn the surrounding water into a stinging trap. On World Jellyfish Day, we've collected some really interesting facts about these jellyfish! Check it out for yourself and show it to your friends - maybe it will help brighten up the next holiday season, when our beaches turn to jelly again. Something is in the cards, and more amazing things are in our text!