Giant Jellyfish are real. Is the above picture real? Yes and no. The picture of the jellyfish is real, the diver was shopped in. Links - http://www.diverssite.com/news.php?extend.778 and http://news.nationalgeographic.com/news/2006/01/0119_060119_jellyfish.html

Damn ben ben that was an awsome awnser lol.

yeah, that's definitely a fake, at the poles there are huge jellyfishes, but not bigger than 2 meters