I ran across this link recently and wanted to pass it along for those that haven't seen it. The possibilities for aquaculture and aquaponics are pretty amazing. I especially liked the article about Mike Sipe's Oxygen Intensive Fish Pond's Yield Great Financial Returns.
I also found the article titled Mike's Story very interesting and insightful. I found the approach taken to limit tilapia production in my state somewhat disappointing. It was also interesting that one of the regulators is now proprietor of a fish farm nearby my community.