So I just noticed today that something has taken some big chunks out of one of my corals. Everything I bought was told to me to be reef safe at my local fish store. Do you guys have any idea which critter did it and if so why? I feed my fish twice a day so I feel that they shouldn’t be hungry. This is what is in my tank: 2 clowns, 2 blue damsels, 1 skunk clown, and 1 silver bellied wrasse. I also have one banded coral shrimp and one emerald crab. Here is a pic of the damage. Thanks for your help.