Agkistrodon piscivorus
I tried to talk my hubby into moving that little green plant out of the way of my shot, but for some reason he refused. :)
I believe this beauty was about to shed (notice his eyes).
Cottonmouths (or water moccasins as they are sometimes called) can be aggressive, but will normally try to escape before showing you the inside of their mouth, which is mostly white, hence the name "cotton mouth."
He was in a swamp area of Beidler Forest, and was not a captive snake. I was beyond thrilled to have spotted him.