Yes. Some more often than others.
I doubt it.
Simply, a "shell change".
a shell...
There shell
Their shell
A hermit crabs abdoman is long and soft. They insert it into the shell, and wrap it around the inside. They can change out of it any time they want.
What I know of that is hermit crabs will eat snails. However, hermit crabs will often use an empty shell of a sea snail.
some crabs, like hermit crabs
They aren't; they need a shell.
break the shell just kiddin
To change into a new shell or to mate. If not for these reasons, it is very sick
No