Jellyfish are one of earth's most ancient animals, and many scientists predict they will be here long after we're gone. Could these creatures that are 95% water with no brain and no backbone be the planet's ultimate survivors? Join some of the world's foremost jellyfish scientists in uncovering the secrets of jellyfish success. It seems there is a lot more to jellyfish than we ever could have imagined. Jellyfish Rule! Is the remarkable story about the one of the planet's most successful animals. They thrive in waters where virtually nothing else can, and their numbers are increasing in marine ecosystems around the globe. Jellyfish have sounded the alarm about the condition of our oceans. Will anyone listen?