Like a lot of coldwater fish, channel cats can be pretty scrappy. One lfs once had a beautiful velvet-black bullhead cat he sold us for, like, 50 cents. About 2" long, all the critter would do is hide until feeding time. Then it would emerge, beat up all the other fish and steal the food, then hide again 'til next time. Finally, we released it in a private pond where it became crane food for all I know.
BTW, clearwater channel cats are about the best tasting fish there is.