jewelvin wrote:
It could be.
However, cottonmouths are pit-vipers and have a large, triangular head. The head on the second photo appeared more cylindrical than triangular. Attached is a photo of the Florida water snake, the color pattern looks awfully similar to your first photo.
One thing I noticed while living in Texas is that the water snake's colors were much darker and more pronounced and I didn't see any that were fat. Most venomous snakes have joules or a triangle head but not all do.