It looks like cotton mouth. Someone else will definately let you know but I would not have pulled that out of the water lol. Or water moccasin. They look the same to me from a distance. I hope someone clarifys it for you. Just the shape of the head screams venomous to me. I dont know much about water snakes so I could be wrong. Someone tell me, are they the same snake? I was always confused by that.