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SaltedShrimp

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Howdy. Been in the reef hobby for a very long time, but I have never seen this growing in any of my tanks. Any ideas? I have aiptasia and initially thought it was aiptasia that was retracted, but some cliser inspection I can now confirm it is not. This is the best picture I can post as it is a zoom and the rock ia at the back of the tank.

The tank is a 120 gallon and fairly new. It is about 6 months old.

20210616_170515.jpg
 
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SaltedShrimp

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Looks to be bubble algae. Scrape it off out of the tank and try not to let it spread. Emerald crabs eat it.
Hi Sharbait, thanks for the reply. It is not the picture is not great and light reflection makes it look like bubbles. Let me explain. It almost looks like a zoa polyp, slightly larger, it has a foot and the side bubble looking things are where the tips of a zoa would be.

I tried to get a picture from the bottom so I can show you, but not possible due to the angles.
 
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SaltedShrimp

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Is it like this:
1623861010098.jpeg

It certainly is very shiny and I can’t think of anything else that reflective.
Nope, not at all. It honestly looks like a single zoa polyp, but with roundish tips. It is also not green at all, it is blue :)

I have been in the hobby for many years and first time I have ever experienced this.
Never mind my last post then, retracting is a sign of a nem or coral.
Does it have long tentacles other than when closed up?
@KJ
No, it is like it is in the picture that when open, when toughed it kind of closes up in a way it just gets smaller, if that makes sense.

Will try and take pictures using just the flash with lights off.
 
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SaltedShrimp

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It is really difficult to take pictures so far back. Here is a picture from a higher angle, you can see it is some typd of polyp/anemone. The pic feom the bottom does not work to show its foot.
 

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KJ

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It is really difficult to take pictures so far back. Here is a picture from a higher angle, you can see it is some typd of polyp/anemone. The pic feom the bottom does not work to show its foot.
Hard to tell from the pic.
 

ying yang

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I have no clue whatsoever but could put phone in clear zip lock bag and get closer picture.
I seen some do this on holiday in swimming pool and as im curious person i had to try it and my phone stayed bone dry.
But to add i got samsung s10 + so waterproof phone so wasnt that much risk and saltwater more corrosive but try it in tapwater first to give you more confidence if willing to try it that is.
 
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