Funny, people don't recognise a seashell? LOL! Anyway, I know how hard it is to get a shot of something underwater from my various trips to the aquarium. It's really a spectacular shot, I think it just needed more sharpness (there is a razor thin line of sharpness) or maybe color to make it a winner. I'd love to see it in color.
During the voting round I was wondering what the object we're looking at is. So now I pop the question: what is it? At first I tought it was a kind of vaze?