Live like a jellyfish.

bloop bloop

Only a few species of hydrozoan from genus Turritopsis. They are able to just revert between polyp and jellyfish so technically never die, but is a little like a species of embrio growing inside the body so could be said also that they clone itselves and their clon takes the place. In that sense much more vegetables are inmortal, with a little help from humans. We can trace easily some cultivars to several thousand years and a few historically relevant specimens to 2000 years ago or so. I'm talking of a single individual, not of the species.