This can't be true for Crappie
"There are a lot of myths floating around out there (no pun intended) about fish. One myth is that the fish is a wily creature that is cunning and nearly impossible to catch unless one is intimately familiar with the habits of the fish and knows exactly what equipment and bait to use. Another myth is that the fish is an extremely picky eater that will only eat certain things, and it will only eat them if they are presented in a precise and totally natural manner.
Fact: fish are stupid. They have a brain about the size of a pencil lead, and the most intelligent fish on the face of the Earth is only marginally smarter than most fishermen.
Fact: fish will eat about anything. If a fish is hungry, and if something looks even vaguely like it might be food, a fish will bite it. The fish may be stupid, but it knows enough to know that, “Hey, if its food I’ll swallow it; if it’s not food I can always spit it out.” I have caught fish with bugs, worms, shrimp, chicken livers, canned corn, bacon, spam; I even caught a fish once with a piece of bubble gum. The fish doesn’t give a care. It just wants a meal."