If you're heading into the water around the Jersey Shore this summer, there's one tiny creature you probably want to know about. A venomous jellyfish species known as the clinging jellyfish has once again been spotted in New Jersey waters, and experts say its sting can be far more serious than most people realize. The strange part? You probably wouldn't even see it. The clinging jellyfish is nearly transparent and only grows to about the size of a dime.