Are they making the bass fat? The first time I ever remember hearing about Tilipia was in Progressive Farmer magazine. A pig farmer was putting them in his waste pond to process the runoff from his pig barn which was to be washed down daily. They I saw a show on "Dirty Jobs" where they put tilipia in with striped bass to proces their waste. I think you need some kind of a poop fly. I can probably help you out, I have several that looks like poop.
"Patriotism supporting your country all of the time and and your government when it deserves it"- Mark Twain