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Old 08-27-2013, 10:47 PM   #1
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Is this a barnacle??

These zoas were doing great and all of a sudden aren't opening fully. Always thought it was a barnacle and harmless but am now wondering if it is something that is harming them.
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Old 08-27-2013, 10:57 PM   #2
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It looks like a tunicate. Hard to tell from pic. Does it open and close on the end? What happens if you touch it? Could be a few different things.
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Old 08-27-2013, 11:02 PM   #3
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And tunicates are good filter feeders. You could probably pull it off. Gently.
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Old 08-27-2013, 11:04 PM   #4
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It does open and close. Nothing really comes out of it just an open hole. Would it be growing and affecting the coral?
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