So, I finally took the leap. I am raising sharks in my aquaponics system. I believe they will prove far more useful than Tilapia. I have done a lot of research on this, and this is the definitive conclusion of years of pouring through scientific literature. These are the main reasons:

1) Sharks are cooler.
2) Sharks taste better.
3) Larger range of feed options, including ex's, arch enemies, or politicians.