This is a clip from an episode of BBC's Life Story and it shows how orderly (and also completely chaotic) hermit crabs can be when it comes to trading homes. They all meet up in front of a shell, line themselves up from biggest to smallest and then trade shells with each other by jumping from one to the next.

Of course there are jerk crabs who try to jump the line though.

Click here to view this adampash.com embed.


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