Chinese Water Dragon and Hermit Crabs

Question
Is it possible to keep a hermit crab in a cage with my Chinese water dragon, or would it be best to get the crab its own cage?

Answer
The crab should have its own cage , even thou the lizard isnt likely to bother the crab you can spread mites from a crab to the lizard or via versa, also the hewrmit comes out to eat at night this might startle a sleeping lizard into running into the glass.