Thats true, my brother has one now in his reef tank and his or her home is in this huge rock which has obviously now impossible remove because many of his clams have made it their homes. We've tried traps and even bait, but all we could find was the molt. There's also a pistol shrimp in his tank too which we have not tried to extract, and similarly we have only been able to find molts every once in a while. We both know that mantis in my brother's tank is working because all the hermits and snails are gone.
