I've put the mode as survival for a reason, because it can either be survival or creative, I was flying in a /fly mode, so no hard feelings.
Alright, first off I do wish to state that yes I am using optifine, and no it is not the source of the problem, I unloaded optifine to check to make sure before posting this ticket about the problem. ( I am only using optifine so I can zoom in at this water )
Alright onward with the problem, when water is placed from high end places and moving downward, you'll get this weird looking effect inside the water itself.
As you can see, it looks like there is layers, now this isn't really a harm to anyone, it's just VERY ugly, and a majority of the players might get bugged by this.
Switch to "Fancy Graphics" - you have "Fast graphics"