Hi everyone I have a problem with one of my corals. This is the only coral in the tank that I don't know its id.
It was doing fine and when it comes out it has loads of green and waves in the current like anthelia.
However in the last week it has closed up and and purple has started to grow on it. I tried to scrape the purple of but it just scraped the purple and the coral of just leaving the rock. It has continued to grow over the coral slowly. Please help I have no idea what to do.
This is what it looks like now
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