I checked state regulations regarding raising tilapia and they are extensive and very stringent if you are to follow the law, which is what I will do. So I've decided not to raise tilapia even though that is what I would have preferred. I wanted a food fish that is an omnivore, but am having a hard time finding species that are suitable. I'm nearly sure that I will raise Koi along with a food fish (as opposed to ornamental). Some candidates are: hybrid bluegill, black crappie, hybrid buffalo, and the perennial catfish. I would appreciate any suggestions.