> Lobsters, flatworms, immortal jellyfish and hydras are all believed to be immortal.
What is the oldest known living individual for each of these species, and for how long are they alive?
What is the oldest known living individual for each of these species, and for how long are they alive?
For the jellyfish, we don’t know. Their cells are indifferentiable by age and they’re bastards to study, with only one scientist in Kyoto having managed to culture them [1].