Will porcelain crabs breed?

[jabberwock]

I have identified 5 different individuals. Is there a chance they might breed in my 25 gallon lagoon?

 

[blaxsun]

Anything's possible, given the right conditions (don't have a clue what they might be).

 

[jabberwock]

A line of evidence... I pulled a small rock to glue a macro algae piece, and this fell out of the rock. I saw my regular 5 earlier in the day, so this one is new. That is my pinky finger for scale. Very tiny.