I'd say they are pretty resilient.
So long as you have at least 2 crabs, deep enough substrate so they can molt (the bigger the crab, the deeper the substrate), and fresh and salt water.
They prefer temps between 70 and 80 degrees F and humidity between 60% and 80%. But my temps have dropped to around 60 (in the winter) and humidity as low as 50% and my crew are fine. They will most likely dig down and hibernate if temps are kept that low for awhile.
~Kimmy, Zam, Logan, Raptor, Nimrod, Mei, Jasper, Esme, & Lucy Inara
RIP Kia, Chipper, Morla, & June
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