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I have about 5 colonies of that and it seems to be growing. I had 3 and spotted 2 more on some other rocks...Is it a good thing?
 
Sorry, but I did not take the picture. It was one I found. I have 2 of them in my tank but could not get a good picture of them so I just used that one I found. Astrangia, is that a LPS or anemone?
 
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