Download our jellyfish guide in PDF format here.
One day you're floating in the ocean, playing "spot Lady Gaga" among the billowy tropical clouds. The next thing you know, something has enveloped your outstretched hand. It feels like a plastic bag. But when you look down, you realize you're surrounded by purplish orbs the size of dinner plates. Indeed, the jellies are here again, clearing beaches from Fort Lauderdale to the Keys. So in light of their miraculous reappearance, we asked marine biologist Monty Graham what ten things we need to know about jellyfish.