Check out this guys video. Best Ive ever seen.
http://www.youtube.com/watch?v=7r1ZqEgNNUc
Would like to learn how to get video like this too. Lighting must be huge part
That's crazy sick! it'll take me years upon years to get to that level

Check out this video, not directly reef related, but does cover some ocean shots/fish. Truly inspirational. Never posted a vid before, hopefully I did it correctly.
http://www.youtube.com/watch?v=3Ger9exVd2I&feature=player_embedded