Stunningly beautiful images! It sure has been a great year!
I'd have to break the rule too and post three, sorry guys, but all of them a favorite from different points of view:
1st one is my favorite from a technical point of view:
Carybdea marsupialis

2nd one is a favorite from 'artistic' point of view:
Cotylorhiza tuberculata

And the 3rd is the one I personally love the most for sentimental reasons. The guy on the photo is my best dive buddy Filip and he deserved a good shot for wasting so much of his precious dive time just to guard me on the surface while I freedive deep with my camera:

Alex, I'd let you decide and pick the one that should stay in the thread...
Edited by Wishbone, 29 December 2009 - 11:38 PM.