World's Deadliest Jellyfish

Jellyfish can grow longer than a blue whale and are the deadliest creature on the planet. Their simple basic design comes in many shapes and sizes. They have no bones, teeth or brain and can thrive where others perish. Their power lies in tentacles packed with venom and out of 2,000 species of jellyfish, around 70 can be dangerous to us. They were one of the first life forms on earth and they may well be one of the last. These are the world's deadliest jellyfish. (National Geographic)