They aren't; they need a shell.
There shell
They have a shell because their abdomen is very vulnerable and they need a shell so that the abdomen is protected from predators
a shell...
Their shell
some crabs, like hermit crabs
What I know of that is hermit crabs will eat snails. However, hermit crabs will often use an empty shell of a sea snail.
break the shell just kiddin
yes they are protected in California as California is kind of a tropical country with many seas and they are many hermit crabs which represents California, thus California protects the species of hermit crabs
No
As hermit crabs grow and increase in size they need to come out of their shell in order to find a larger shell to live in.
Yes, Hermit crabs can only maneuver when they can lift and fit the shell appropriately.
no; he doesn't have a shell