A hermit crab will not stay in one shell his or her whole life. As they grow, they'll need a larger shell to live in. They might even change from shell to shell until they stay in one they like.

In this video, you see a hermit crab inspecting a possible new shell before he decides to live in it. Then he pulls itself out of the shell he was in and positions his tail into the new shell and will make a new home for himself.

I shot this video myself while I was at work. :) Enjoy!