Naraku_Diabolos on 19 March 2010
If any of you on this thread have Endless Ocean: Blue World/Adventures of the Deep, this jellyfish IS in the game. I pointed this specimen to my sister the other day while playing the game, and she really didn't believe that a jellyfish or any animal could be considered 'immortal.'
EDIT: http://en.wikipedia.org/wiki/Turritopsis_nutricula for more information.
