Amazing Crabs Shell Exchange | Life Story | BBC

25 Sep 2015 04:16 14,078
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New David Attenborough series Dynasties coming soon! Watch the first trailer here:
https://www.youtube.com/watch?v=JWI1eCbksdE --~--
As a hermit crab grows its shell becomes a tighter fit so eventually the crabs need to move into a bigger one, leading to an amazing exchange. Taken from Life Story.

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