I finally caught the last of the bad hitchhikers, a 1" gorilla crab, in my display. I put him in with my N Curacaensis. The gorilla was alive when the lights went off last night. I hadn't seen anything since then, however about 10 minutes ago the Mantis pushed whats left of the crabs exoskeleton out of his burrow. I'm surprised he was able to eat the entire thing, the crabs body was about 1" across and the Mantis is no more than 3" long.