<span ="Apple-style-span" style="font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; font-size: 13px; line-height: normal; white-space: pre-wrap; ">This is something that I have never heard of, but makes perfect sense to me. Saltwater tropical fish spawn on the reefs in the Caribbean, Florida, and Carolinas and the fish eggs and larvae are carried up into northern waters by the ocean current. They end up in places that can not support them during the winter months. Here is an article that I stumbled onto from the New York Times. Be sure to check out the video segment in the article.
http://www.nytimes.com/2008/08/05/science/05fish.html
Edited by rdbrown - January 11 2010 at 8:37am