Jellyfish can be scary. We know they come in all shapes and sizes and some can sting, but there are a lot of unknowns as well. Our Extraordinary Person of the Week studies jellyfish and says there are folks think jellyfish populations are on the rise. His research, though, shows that it's a myth. In fact, he says jellyfish numbers rise and fall over a 20 year time frame and it's that kind of knowledge that makes Rob Condon....the Jellyfish Whisperer.