the.com/jellyfish
the closest thing to immortality, drifting brainless and 95% water through every ocean since before dinosaurs
no brainSurvives fine with no heart, brain, or blood
older than treesDrifted oceans 500 million years
immortal trickOne species reverts to youth, ages backward
deadliestBox jellyfish venom can kill in minutes
name lieNot fish at all, just goo and tentacles