they run across your kitchen floor FAST! (dont ask lol)
If you have females, they may well become gravid, but the larvae require saltwater to develop. In other words, these present a challenge similar to that posed to freshwater aquarists by Amano or bamboo shrimp (not so much insurmountable as judged to be too much trouble and left unattempted). There's at least one scientific paper on the larval development of Cardisoma guanhumi, and several hobbyists have successly bred red-claw crabs in captivity, so the possibility deserves to be kept in mind.to my knowledge they don't reproduce in captivity then again theres 0 info on them