Does anyone know or have any experience with emerald crabs. I bought one from the group buy and now some of my live rocks are losing it color. He's picking at it and it's turning white.
Emeralds will scrape coraline off rock. However, one usually will not cause extensive damage. Ours used to do the same thing, but I believe some of the coraline
might have been diying off. He doesn't do it anymore. Or, I am not home enough to
see him do it
