Siaes Tunnel, Palau

Your comment please, I probably wont be there again in the near future but I loved to know how to improved this shot.

Nice. My preference for a shot like that is either light the diver's face or make it completely dark. In your photo, I find myself drawn to a face that's not well lit.

First of all its a good shot, I would have carefully added some red to brighten the corals in the front and increase the contrast so the diver would be only a siluete.