I can say, (even if I'm not Jim)
that you have done some nice Photoshop work here, but the rocks are to white in my taste. A healthy aquarium should have more algae growing on the rock. (Purple, red and brown "limealgae" or whatever they can be called.) Maybe the rocks should be more sunk into the sand and not hover half an inch over it, also.
BTW, I don't agree with hpman77, the clam is too dominant, hehe.