I emailed the URL of this thread to the dive club. I think this issue was definitely worth mentioning, and does bear a second look. It really ticks me off when manipulated photos are mingled with pure, undoctored images. That's why there are "open" categories, and this contest had one. I'll post the details of any response I receive.
The original poster on this thread said it couldn't be a digital image, because the contest rules specify 35mm slides. Yet, this also applies to the open category, which are obviously digitally manipulated. You can get a 35mm slide made from a digital image for about $2.00, so this could easily have been done.
This is just my opinion, but besides the fakery, which to me is blatant, I don't think this is an image worthy of a grand prize even if it were real. Yes, it's a detailed shot of a pretty fish, but that's all it is. It isn't composed particularly well, and doesn't move me, or capture my imagination in any way. It's just a fish face.
While not perfect, the saltwater images of the diver and jellyfish, diver surrounded by dense school of fish, and the freshwater winner (cenote shot) are all far superior photographs.