Davis has his fourth in the well. It looked to be 2-pounds plus and certainly gets him in the 12-pound neighborhood.
He's placed a black marker buoy on and around his key area. You can barely see it from here sometimes and then only if you are looking at it.
I can only surmise, the black is so none of the other anglers can pick it out and get a bearing on this key spot.
Some might say sneaky, others might say shrewd.