Jellyfish Gone Wild: Environmental Change and Jellyfish Swarms
http://www.nsf.gov/news/special_reports/jellyfish/index.jsp
Explains the basics of jellyfish biology, why they are becoming such a problem in areas like the East Coast of the U.S. and Chesapeake Bay, and what scientists have discovered about the causes and future of jellyfish blooms. From the National Science Foundation