Fantasy Waterworld

The first thing I did (as I do with any picture I critique) is look at it in full view. In the case of this picture, I would suggest you disable full-view, if that's possible. I think there's a way of doing it, but I've never felt the need to do it. It looks a LOT worse in full-view and the coloring looks very grainy. Or simply resize the picture so the full-view picture is smaller. Now onto the good part.

Normally I list the good things first, but this time it made sense to list the bad first. The amount of effort you put into this piece really shows; it's easy to believe you spent half a year on this. How big is the original? Also, I love all the intricate details in the picture, especially in the water and on the light green...thing...behind it, which I have no idea what it's supposed to be.