Fresh cut or live bream can be excellent bait for bass or catfish. One of the larger bass I have seen caught was caught on a bobber rig while fishing for catfish.
A very small bream was caught, maybe 3 or 4 inches long at the most. We used a larger bass hook and drove the hook though the fishes body, back near the tail so as not to kill the bream, but near enough to the center of the fish so it would not come off.
The injury to the bream will cause it to swim around in distress, this attracts the predator fish.
Cut bream would also probably work for catfish.
One word of advice is to set the hook quickly, that same large bass literally inhaled the bream and hook, and only the tail was sticking out of its throat. We cut the line and hoped for the best.