Thought to have been around for over 650 million years, these primitive evolutionary survivors can range from the size of a pin head, to over 8ft in diameter with tentacles stretching out for up to 50 meters. Comprised of 95% water, Jellys have no need for respiratory or circulatory systems. They have no blood, no hearts, no bones, no eyes or brains, and do not posses a central nervous system like that of more complex lifeforms.
