We have seen some wondrous things out there! Just stopping long enough and waiting for it to take place.
One time I saw what looked like a patch of seaweed on the bottom a short distance from our boat. When I noticed it was moving, I jumped in the dink (SO excited) I only had oars and a face mask with me. Made it over the spot, looked down AND.... it was flight of rays!!!! Literally thousands of them!!!! So thick you could not see the bottom below them. By the time I could get back to the boat for a camera, they were gone.
We went whale watching, just stopped out there and had an experience that touched our soul! Did manage to get that on video. ( http://youtu.be/HHi6j6bY0Po ). Sad that I did not have a high def camera at the time. To long ago...
We also carry a couple of the same type of dive flash lights. Used to have the halogen, but now LED. LOVE THEM.
Greg