What a wonderful render!!! I dont think I've ever seen a beach scene like this. Did you use terragen? The only think I would work on would be the texture on the mountain peaks. As there is no texture. You seem to be capable judging by your grass/sand texture. Very nice! I like the opacity of the water at the salt deposits. Good job man. 10/10
The clouds and the water are terrific. I'd definitely raise the bump height on the mountains to make it look more realistic. But that's really the only thing I would suggest. :)
This is an awesome image! I'm not a photoshop expert, but if you'd like to make it a bit more realistic-looking, you could somehow blend the edge of the water with the land better. The transition between water and sand is so abrupt, perhaps make the water near the shore more translucent, or add a "wet sand" coloration on the edge. Very good work, I like 3D fractal mountains; they look more realistic than I usually end up with. Thanks for sharing!