whoa, that is an interesting photo. When I looked at the thumbnail, I thought that it was an underwater photo. But I do think that it's a bit too bland: upping the saturation, darkening the shadows a bit, and making the image a bit warmer would give it more liveliness, more contrast. Very nice.
I too like the composition and i also like the lighting. Giving it a little more contrast and perhaps up the saturation a bit would make it even better. It is a beautiful and very intersting photo.
Christer