hydrozoa.jpg

So apparently there's this little jellyfish creature (Turritopsis nutricula, a form of hydrozoa) that doesn't ever die. 
What these little folks do is they revert completely to a sexually immature, colonial stage after they reach sexual maturity. They're even cooler than that. When they're young they've got only several tentacles, but at a mature stage, they get to 80-90 of them. They're able to return to polyp stage due to a cell change in the external screen (Exumbrella), which allows them to bypass death. As far as scientists have been able to find out, this change renders the hydrozoa virtually immortal.
This is very fascinating. How deep does this fella have to be to be able to live forever unharmed?

Meet the world's only immortal animal [zmescience]
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