Tardigrades are awesome, but what about those unaging jellyfish?

I mean yeah still not quite the same thing. IE obviously I don’t see jellyfish surviving in space. But do tardigrades age?

Which side note it looks like they do… while they can basically go in suspended animation, waterbears seem to have about a 3 year lifespan.

So, these guys are virtually unkillable for 3 years, but Turritopsis dohrnii while it can be killed, can live forever.