Thanks so much for all the replies. Basically I'm pretty sure it was a war between this coral and a hollywood green stunner chalice.
Now it's recovering what's left of it and hopefully will grow back.
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Playing "The Creator' in a glass box full of water.
Current Tank Info: 90 gallon, OceanRevive T247 Led fixture, Curve 5 Skimmer, 30 gallon sump, gfo reactor, 50 lb live rock, 2 RW4 power heads, planning to be a mixed reef.
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