Obviously, this diver hasn't seen the movie "Anaconda." According to the Daily Mail U., diver and snake fanatic Franco Banfi took a dip with a anaconda who was on the prowl for food in Mato Grosso, Brazil.
This is easily my favourite snake reference for the change in colour below/above and also showing the way the body curves. Also the indentation at the spine shows well here. What a beautiful white lipped python!