[Since it's easier to show than to explain, John sticks to video. He pans the camera around to the two large jellyfish behind him.]

They hatch into a smaller version of one of these. These are Jellicent, and their first form are called Frillish. They're the same exact species, they just look different depending on if their boys or girls. Half ghost type, half water type and they make for really awesome floaties. You know, like in a pool or the ocean or something.