Been tied up with other things for the past few days and just now getting back to this thread.
CA's pic doesn't give enough info to know exactly what it is but, I'm thinking its a tree probably sunk by someone. Can't see the bottom. Dept is 24' and the cursor is at 21'. Temp was 39 degrees. I would guess its a cedar tree and has a bunch of crappie in and on it.
I definitely would have thrown out a marker bouy and checked it out!
I took some screen shots yesterday at Texoma but, forgot to bring in my SC card. Will try to do so later today or tomorrow.

