I have been reading the posts here and I am going to come down on Eric's side on this issue. I am starting to see large gizzard shad this spring not many but some and now there is no way to control them. I have a few bass that can eat a one pound injured hybrid but not many. If I wanted to get rid of them at this point I couldn't. I didn't stock the gizzard shad they just appeared after a flood. The problem that I see is that you lose control. The good thing about tilapia or trout is that if you stocked too many this year you can stock less next year. Eric how large would you guess a hybrid would have to be to eat a large adult gizzard shad? I think that the hybrid is a better shad predator than a bass.