no mold on crab shells is not bad for you but it is bad for the crab
A crab that lives in the shells of other shell fish is called a hermit crab.
It is like a bone that protects the crab.
They probably come out of their shells to do it, but no crab has reproduced in captivity.
A hermit crab.
No
hard shells
no not usually
Chitin in crab and lobster shells can be used to make contact lenses and dis-solvable stitches.
A hermit crab lives in the empty shells of other sea creatures. As it grows it moves on to bigger shells.
Well no, crab shells can't be tiles. Well you may strategically place your terrible claws upon my posterior and kiss it repeatedly!
a hermit crab can go all the way out of its shell to switch shells