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Measuring Hermit Crab Shells

Wee wants to be big so bad
Wee wants to be big so bad

**A newer version of this article is available:

http://crabstreetjournal.org/blog/2018/02/11/land-hermit-crab-shell-guide/

Hermit crab shells sold online are typically sold based on the size of the opening. When purchasing new shells for your hermit crab, measure their existing shell and then choose several shells that are somewhat larger. Hermit crabs typically prefer a shell that fits snugly allowing them to fully seal off the opening to protect themselves from predators and dessication.
The photo shows how to take measurements properly.

Measuring hermit crab shells
Measuring hermit crab shells


Ecuadorian (C. compressus) typically prefer a shell with a D shaped opening and commonly wear shells that are too small.
Other species will wear a variety of shells, both with circular and D shaped openings.

HPIM2673
Circular opening shell

 

D shaped opening shell
D shaped opening shell

 

My shell is too small!
My shell is too small!

 

Coenobita cheliped pincer claw
My shell fits just right!

 

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Related

2015-10-28
In: Archives
Tagged: accurate, fit, hermit crab, measure, proper, purchase, shell, size
Previous Post: Hermit crab grooming
Next Post: Ask Milo – Black Tahiti Sand
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