T1i Setting...
Hey Josh,
Just a tip. It seems like you have the camera set to a center AF point. if you made that setting all points, the entire piece of coral would be in focus instead of just that one point. It would make your shots that much better!
I had that exact same problem when shooting my last set of pictures. I since then have a adjusted it and I now can achieve full resolution throughout the coral specimen. It makes the pictures that much more striking!
Good luck, keep shooting!