Ever wondered how to make a beautiful, turqouise and realistic water material in Cycles? Well it here it is!
If you are lazy, you can just download the .blend file: http://www.blendswap.com/blends/view/71325
The water gets darker, as it gets deeper.
On deep water it looks just as realistic.
-Is easy to make
-Does not work underwater
-Is not animated (can be done though)
-Requires the seabed to be textured in a specific way (see tutorial), so the shader won’t work right off the bat.