I had a white bass in an aquarium for a while. He was a minnow eating machine. His record was 27 small crappie minnows in about half an hour, not bad for a 9 inch bass.
Bullheads have terrible eyesight and will swim by anything without seeing it, great sense of smell though. Drop a worm in one end and 4 feet away he would come shooting out of the brush he hid in. He'd put his head down with the whiskers just brushing the bottom and do a regular search grid until he found it, always by taste, never by eyesight. If he missed it with his whiskers he'd just keep going but if he chanced to brush it with his tail he would just whip around and hammer that worm. No doubt they have taste buds everywhere.
Creek chubs will hammer anything that moves but only in daylight. The other fish only got what the creek chubs missed or couldn't fit in their stomachs. Fed them one night using a red light and the perch and creek chubs totally ignored the minnows. The only one they ate was one that literally ran into his mouth. The walleye and bullhead didn't mind the dark at all, they really went to town on those minnows.
One funny thing, I had a small perch in there. At first he wouldn't eat which didn't surprise me but two weeks later he would still ignore a worm dropped right in front of his nose. Finally had some minnow available and dropped one in. That little perch came just a flying out of his hidy hole, across the tank and just hammered that minnow. I guess he only learned to eat minnows in the wild and had never seen a worm.
Always wished i could have found a small pike back then to observe but never did. Would have had to be a pretty small one though if you had anything else in there. Even the dinky walleye i had killed two creek chubs that must have been about half his size. One he managed to swallow but the other he just killed. Maybe he was cheating at cards or something, who knows.