I hope it's okay to post this here. I found this article this morning and found it interesting enough to share.
http://dsc.discovery.com/news/2008/05/15/fish-evolution-lake.html?dcitc=w01-101-ae-0001
http://dsc.discovery.com/news/2008/05/15/fish-evolution-lake.html?dcitc=w01-101-ae-0001