How to Help a Hermit Crab Change Shells

Hermit crabs must change shells periodically as they grow or they will die. Follow these steps to help your crab change its shell.

Instructions

Difficulty: Moderate

1. Choose shells that have round openings for the crab. Try to find shells that have only one opening, and if there are more holes in the shell make sure they aren't near the crab's abdomen.
2. Measure the crab's largest claw. Take care not to frighten the crab, but get a general measurement of the claw. Find a shell that is slightly larger than the claw, with enough room for the claw to fit slightly inside the shell to protect the crab.
3. Seek shells that have a mother of pearl lining, which hermit crabs refer to a rougher and less comfortable lining.
4. Leave out a selection of shells of different sizes and weights. Keep shells of slightly different shapes as well in order to give the hermit crab enough selection to choose from.
5. Give the crab privacy when he begins inspecting shells. Leave the room dark and quiet, in order to keep the crab calm enough to leave his shell and enter another one.

Tips & Warnings

• Don't wait until a hermit crab is homeless to provide extra shells. Crabs should have shells available at all times. When providing routine care, check the extra shells and make sure they are clean and free of mites.