Very cool shot. I tried to take a photo like this but it was so dark that I had to keep the shutter open too long. They just turned out blurry. The detail on this is great especially for such a small creature.
Oh my! I think that's the very first time I've ever seen a photo of a jellyfish here on DA. It's so beautiful. I know they sting and bite, but they are truly lovely to look at. Thanks for posting this.