Your hermit crab has to have a gender you can tell by these hole looking things on their side ( forget the name) u cant see them because they are under their shell.NEVER ATTEMPT 2 PULL THEM OUT OF...
It depends on the type of crab. For crabs like Mini Crabs, the male will have one large front claw and one small one, while females have two small ones. I am not sure about other crabs.
For most...