Do Hermit Crabs Sleep?

[tibibi]

When hermit crabs place themselves in hidey place or somewhere and partially or fully retract into their shells are they sleeping or just grooming themselves inside their shells. I don't want to be disturbing my crab if she is sleeping!

[Yuka]

Probably sleeping. To groom themselves, I'm pretty sure they just wash out any gunk in the water bowls.

[wodesorel]

They can't actually "sleep". Their metabolism slows and they go into a stupor to conserve energy until it's time to eat or drink or move again, but they aren't sleeping like mammals do.

[Pepe4Life]

Question. Is there a specific time of the day they go into this stupor. Or could it be whenever needed? Just curious.

[wodesorel]

It seems to be whenever. Generally during the day though since they are active all night long.

[tibibi]

Thanks guys!