hitch-hiker crab

[MMAX]

How big is the piece of rock? If it's not too big and nothing else is growing on it you could try freshwater dipping the whole piece. That clicking sound usually means one thing but it's funny that none of your clean up crew has gone missing.

[Leah]

I still hear clicking in my tank I have already removed 1 mantis but have seen nothing.
I have lost 2 Sally lightfoot crabs but I have angels so don't know. I have a 2 inch gobie and he is still in there so either he (whatever is clicking) isn't starving or he has only a taste for crab meat.
Back to my point he has caused no real trouble! But if you really want it out I would go for the freshwater dip...thats how I got rid of the first one. I new where he was so I was
actually able to squirt water into his hole.