So, I'm convinced that amphipods will eat coral when they get hungry enough. I have my suspicions that they do this in newly established tanks that are very clean like mine was.
I'm 100% sure of this because I did a test. I noticed my newly aquired acan being munched on at night by fairly large amphipods. As others have mentioned, it could have been that they were just eating dead flesh, but I doubted it. So I took the acan and put it up on top of an upside-down glass bell jar figuring the amphipods couldn't climb it. That night I didn't see any amphipods on it. The NEXT day the coral looked better - more inflated.
This was months ago. I left the coral on the bell jar for a long time until it healed and was growing well again. I put it back on the sand bed and it hasn't been bothered since. My guess is that there is enough other food sources and the amphipod population s balanced out so they aren't starving. I'm no expert, but this is my experience. Good luck!
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