Jellyfish Taking Over Oceans?

A jellyfish under the Ross Sea ice, on October 14, 2005 (Photo by Henry Kaiser, courtesy of the National Science Foundation)

Some scientists are warning that as overfishing and climate change affect the world's oceans, jellyfish will take over the ecosystem. That could mean that eventually, if you cast a net into the ocean all you'd haul in would be jelly blobs. But as Ann Dornfeld reports, such warnings may be premature:

Photos and info on jellies from National Geographic

An article on jellyfish from the Discovery Channel

Producer: Ann Dornfeld
Release Date: June 22, 2009
Running Time: :50