rejuvenations of the Jellyfishベニクラゲ


As we get older, we sometimes think, “I wish I could start my life over again.” This is impossible for humans, but there are some creatures that can do it. It is Jellyfish species Turritopsis spp . It is Turritopsis spp that belongs to a different group from jellyfish , and it belongs to a group called hydrozoa.

A characteristic feature of older Turritopsis spp is that they begin to rejuvenate. Turritopsis spp , which reaches sexual maturity and reaches the limit of its body aging, has an unusual ecology in which it reverts to a “polyp”, which is a juvenile Turritopsis spp  .

In other words, even if the jellyfish gets old, it is possible to grow back into a child (polyp) again.




Older adults of jellyfish usually die and melt away, but the jellyfish do not melt.They become ball of tissue and can extend their roots again and rejuvenate into polyps (the basic form of cnidarians).


the jellyfish gets old, it is possible to grow back into a child (polyp) again.

These polyps form jellyfish buds that eventually separate and swim away as young jellyfish.Because this series of cycles is repeated endlessly, it is said to be “immortal”.



The rejuvenation phenomenon of jellyfish was first confirmed in 1992 by Italian researchers in Mediterranean jellyfish.Since then, Associate Professor Kubota and his colleagues have succeeded in making the world’s second Japanese product.We continue to update the number of times.In the case of the jellyfish, rather than being immortal, it goes through a stage where it returns to its larval form and “changes its shape (rejuvenates).”