Thread: Turritopsis Dohrnii - the immortal jellyfish (Neat) (Nature is wild)

https://en.wikipedia.org/wiki/Turritopsis_dohrnii

Cliffs:

If the T. dohrnii jellyfish is exposed to environmental stress, physical assault, or is sick or old, it can revert to the polyp stage, forming a new polyp colony.[7] It does this through the cell development process of transdifferentiation, which alters the differentiated state of the cells and transforms them into new types of cells.

Theoretically, this process can go on indefinitely, effectively rendering the jellyfish biologically immortal,[3][8] although in practice individuals can still die. In nature, most Turritopsis dohrnii are likely to succumb to predation or disease in the medusa stage without reverting to the polyp form.[9]

The capability of biological immortality with no maximum lifespan makes T. dohrnii an important target of basic biological, aging and pharmaceutical research.[10]

Cliffs of cliffs:

There is a jellyfish species that can revert to earlier stages of its life cycle. In theory they are completely immortal though in practice they get eaten/sick etc.