When I first saw this I thought it was ice with air bubbles, but after a bit I realized the air bubbles are fish and the ice is liquid. But I could still be wrong. I like the uncertainty. I also like the angel at which they are swimming through the frame. My only complaint is the lack of fish in the lower right, which keeps drawing my eye to the emptiness--perhaps moving the camera a little left and/or up would have helped to refine the composition.

oooh. nice. the water clarity is marvelous. i can almost feel the current. great shot.