No brains, no backbone, no problem! 600 million years ago jellyfish ruled the oceans. Now these mysterious and magnificent creatures may be taking over the oceans once again. Only this time, they're doing it with our help. Discover how overfishing and other man made changes - like global warming, pollution and coastal development - are transforming our oceans in ways that allow "jellies" to thrive.

From the Curio.ca streaming audio-visual collection.