I cannot really explain, why the jellyfish is such a fascinating subject for photography. The transparency and how the organism plays with light, maybe? I played with jellyfish photography couple of weeks ago, in Blank Park Zoo. This is my favorite photograph from that session.
Camera & Lens: NIKON D40X 18.0-200.0 mm f/3.5-5.6, Flash did not fire.
Focal length: 105 mm Shutter: 1/8 sec. ISO: 400 Aperture: f/5.6