A relatively small Flathead for Mosquito but My only one this year due to being unable to fish as much as I'd like this season. The key that I noticed though is that when using a circle hook on a Santee Cooper style slip sinker bottom rig (at least with heavy tackle I use since I'm targeting fish over 30 lbs) is to use your bait clicker or bait feeder and/or drag setting for spinning reels in combination with a typical shore based circle hook rod position for Flathead Catfish. The reason is that the Flatheads typically are less willing to take your bait if they can feel too much tension coming from the rod tip compared to a Channel Catfish. I recommend allowing some give with the reel so the Flathead will pick up your live bait and begin to swim off with it and then tightening the drag or engaging the reel to then allow the rod tip to load to set the circle hook and then I personally follow up with a short sweep provided the weight of the fish is there to make sure the circle hook is sunk in past the barb(I have personally never had a catfish come unhooked from a circle hook using this method and feel that a partial hook set as described is needed at least with large circle hooks to insure the hook will not come out)