My opinion is the bowfin would own the snakehead. A little story about a bowfin experience from back in late January 2004. A friend and I were down in Jasper county doing a fish survey for a consultant in some swamps they want to protect for a nature trail. We had stopped by one of our regular sites to get a baseline on what was out at this time of year. The previous May, we had been chased out of this site by a 10ft gator (they look alot bigger when you're chest deep in the water than from a boat). Anyway, we were seining around the same spot as the gator had been but since the temp was in the mid 30's we weren't to concerned. Suddenly Dustin's eyes get really big and he says "something hit me in the leg...HARD!" I kinds think to myself "yeah right....chicken" when I get nailed in my legs, three times! I see a wake cut across in front of the seine and holler (in a high-pitched girly voice) "lift the seine, lift the seine!" When we lifted it, there was a brightly colored male bowfin about 20" in length. Knowing Riverbanks Zoo wanted one to display in their tank, we took it back to them and it's now happily swimming around one of their tanks along with a couple of longnose gar, a small alligator gar, a large bluecat (~30 lbs), and several species of sunfish. The bowfin now rules this tank.
I had heard that male bowfin will protect their nest but would never have believed they would go after humans and I've got bite marks in my waders to prove it. Never heard of a snakehead doing anything like this.
Chip in SC