Yes plus RES also often feed near the bottom and deeper water and guess who is down there waiting - Mr. Flathead.
Interesting you mention that Eric. This maybe completely anecdotal, but in the mid 90's a reservoir I fished in was overrun with brown bullheads. The reservoir also had a nice population of RES. The VDGIF electroshocked a couple dozen flatheads out of a nearby bigger reservoir with a naturally reproducing population. They transferred these flatheads over to the reservoir with the overpopulation of brown bullheads. Well, the flatheads did their work, turning piles of 6" bullheads into less numerous but good numbers of 12"-14" bullheads. However, the RES nearly disappeared. The flathead catfish couldn't reproduce in the reservoir and I believe the vast majority of the flatheads in there either died of old age or were fished out. I have noticed the RES have made a come back recently...
