Can you get a decorator crab in your live rock? I have found what looks like to me to be a decorator crab and I didn't put it in the tank. Looks like a small piece of rubble walking around about the size of a dime.
Definately not reef safe I made the unfortunate mistake once myself and in less then one day it decided to decorate itself with pieces of my mushroom anemones. I was not amused to say the least.
