Jellyfish Stings: The Longer the Nastier, Say Experts

Any beachgoer, snorkeler, or diver can tell you that while the ghostly forms of jellyfish are beautiful to behold, you don't want to go anywhere near them. It's not uncommon for jellyfish stings to cause painful, paralyzing, or even lethal reactions, and it's often very difficult to tell which jellies are harmful. That's why researchers have looked into a new way to assess these bizarre creatures: by the length of their stingers.