Nah, they're like hermit crabs
when an older tortoise dies, a younger one will move into its shell. There are a finite number of shells in the world.
( Malaka omdz, Sun 24 Aug 2008, 0:34, archived)

I prefer this

( glued eel /questions/questionsyoudliketoask/post1648081, Sun 24 Aug 2008, 0:35, archived)