If you're building a trap specifically to catch Bullhead, I'd cut the entrances about 3" in diameter. That big head needs room to squeeze in but the hole cant be too big or they'll find their way out. Leaving a bit of tag wire poking into the hole and bent inward will also deter them from escaping.
.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!
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