Do hermit crabs make loud clicking / popping sounds ?

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Jul 27, 2021
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I’ve had 2 scarlet hermit crabs for about 2 weeks. They are very small, the size of a dime. Many times I’ve heard this loud clicking sound coming from the tank. This morning when I got up I heard it again. It sounds like something is being banged agains the glass.

I’ve never had crabs before so I don’t know what it means. I’ve researched the internet and all I find is infos about crabs chirping. But this is not chirping. So is this noise coming from the crabs and why are they doing it ?

Thanks !
I've been hearing the same thing after puting a dozen red leg hermit crabs in my tank. It sounds kind of like a pistol shrimp, but I don't have one.

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