I know that channel catfish and carp can often be found in knee deep or less water in the early spring (March and April). These fish love shallow flat area that are fed by warm runoff. This pattern seems to hold true for lakes and Ohio River backwater areas. My question is: Do blue catfish als o invade the shallows in spring? I've never caught a blue cat and was wondering if I might have a chance at some of them during this time.