There could be as many as 300 000 jellyfish, only the Turritopsis dohrnii is believed to be able to cheat death and attain immortality. One Earth explains that “… this species can undergo cellular transdifferentiation. When threatened, sick, or old, it begins a process that reverts its cells to a polyp or adolescent stage and then forms a new polyp colony. Basically, creating younger versions of itself that will become identical to its mature adult form when grown.”

There could be as many as 300 000 jellyfish, only the Turritopsis dohrnii is believed to be able to cheat death and attain immortality. One Earth explains that “… this species can undergo cellular transdifferentiation. When threatened, sick, or old, it begins a process that reverts its cells to a polyp or adolescent stage and then forms a new polyp colony. Basically, creating younger versions of itself that will become identical to its mature adult form when grown.”