So I noticed that a couple Zoas and maybe a few small mushrooms are missing in my tank. I thought maybe the Urchin could've just moved them but I'm starting to think they may have been eaten. I decided to look last night when the lights were off and saw my cleaner shrimp on some Zoas and an emerald crab on my hammer. I'm doubting the cleaner is hurting anything, so I'm guessing maybe the emerald crab. Has anyone had any issue with emerald crabs eating corals? Also the urchin is a long spined black one and I've heard he could be the reason as well...thoughts?
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