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Hitchhiking corals? ID please.


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I have noticed two of these little corals on rocks at opposite ends of my tank. They don't look like any of the corals I actually placed in my tank, and I started with dry rock, so I have no idea where they came from. Is it common for a coral to be a hitchhiker?

Each is about 1/4" diameter.  Any idea what they are?  Here are some detailed macro photos:

Screen Shot 2019-05-17 at 10.19.59 AM.png

Screen Shot 2019-05-17 at 10.20.14 AM.png

Screen Shot 2019-05-17 at 10.19.21 AM.png

Screen Shot 2019-05-17 at 10.19.40 AM.png

Edited by SuncrestReef
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12 minutes ago, youcallmenny said:

I agree it looks like a galaxea but my first thought was maybe pocillopora.  I've seen them spread in that manner.  Do you have a green one?

Ah Ha!  I used to have a pocillopora but it died a couple months ago.  During that time it did seem to have some polyp bailout taking place, so perhaps that's how these two showed up on other rocks?

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