The Box Jellyfish is the most poisonous jellyfish: Its sting can kill within three minutes. In fact, the amount of venom in a Box Jellyfish could kill 60 people. This type of jellyfish is pale blue and transparent, and can have up to 15 tentacles that can reach 10 feet in length. They can be found in the Indo-Pacific and off the coast of Northern Australia, so next time you’re in the area make sure to watch out!
Bonus Fact: The Box Jellyfish has 24 eyes, but ironically has blurry vision. And it has 64 anuses.