Depends on their diet. Catfish, unless artificially fed, are bottom feeders. Whatever muck is on the bottom, that is how they will taste.
The imagination grosses me out. Yuck.
Flatheads prefer live fish. They eat bass, bluegill and other catfish.
They taste great.
Nope. Flat Head Catfish almsot always eat nothing but live bait.
Not neccessarily. It depends on species whether they bottomfeed or not, not on what they are fed.