Excellent image! I'll suggest that you add something in the "middleground" area. You have the background and foreground covered well. The only middleground action is the mermaid on the top left. Perhaps add some vegetation or something that keeps the focus as it is now, but fills in the blank areas without overdoing it. Also, perhaps work with the rocks and decrease the diffusion a bit and ambience, and maybe add a slight more bump. Superb first image nonetheless. Bryan