Jellyfish in Motion-Ocean Life- 3D Postcard Greeting Cards Close up image of a jellyfish in motion - See the Motion of the Jellyfish as You Turn the Card 4x6 postcard - comes in a protective sleeve back of postcard has lines for mailing address All flat 2D photography is just a poor attempt to emulate natural perceprtion - as we see things with our two eyes. 3D images are more natural and more enjoyable to view.