Rainy days

[CrabbyMom33]

I've had mine all head for high places in the tank in rainy weather. I would guess it's a natural instinct to move to higher ground during rain.

[Squeaky]

I tried to see if they do anything different when the tv/video games in the room start flashing and popping with lights and the rest of the room is dark, but so far nothing. When we get storms here I feel like the whole house shakes and the dog goes running for the closet, but the crabs just act like it's any other day.

[wodesorel]

Barometric pressure does seem to affect them. The few times we've have major depressions (hurricane remnants) the crabs were all acting bizarre for a few days. I'm sure it was confusion that it wasn't raining in the tank, since they probably have adapted to knowing that low pressure means severe rainstorms and flooding.