How long can living organisms live?

Depends, of course, on the conditions in which the body has to exist. For example, sponges living in the cold waters of Antarctica live in cold calm waters. They grow very slowly. They have few enemies, and the sponges themselves are very tenacious. Scientists suggest that the age of the Antarctic sponges reaches ten thousand years.
But this is not the limit. Based on recent research, scientists have discovered that Turritopsis nutricula (a species of jellyfish) is born and develops before puberty like all other living things, but once it reaches it, the jellyfish can return to the polyp stage, which would mean for a person to become an infant again after graduation. It turns out that these jellyfish may well claim immortality.