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Old 01/08/2019, 12:48 PM   #1
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Join Date: Sep 2007
Location: florida
Posts: 50
Does anyone know what this is?

This was on some live rock I acquired a week ago. Thanks

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Old 01/08/2019, 02:20 PM   #2
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Location: Canada
Posts: 151
I can't enlarge your photo, but from the thumbnail it looks like either a sponge or, more likely, green star polyps with their polyps hiding.

Pre-owned 75g reef tank with a pair of firefish and a school of pyjama cardinalfish. Future home of a group of designer Ocellaris.

Current Tank Info: 75g pre-owned reef tank with mushrooms, leathers, zoas, SPS corals, sun coral, and some hermit crabs.
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Old 01/08/2019, 03:13 PM   #3
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Location: Redwood City
Posts: 981

2x 65g displays with a 30g cryptic refugium and 30g sump - 55g reef
30g Bio-cube reef - I.M. 30g reef - 200g Moray tank - 45g freshwater
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Old 01/08/2019, 03:35 PM   #4
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The picture is inaccurate showing a purple tint. It is primarily white. Is that because it is trying to make a comeback? This rock is new to my aquarium.

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Old 01/15/2019, 10:20 PM   #5
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Location: Van Nuys, CA
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GSP- Green Star Polyps

I am truly grateful to receive any useful information about this hobby each day... :idea:

Current Tank Info: Reef: 40g breeder with a Aquamaxx HOB skimmer, 250w MH pendant and a 1/10hp chiller.
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Old 01/17/2019, 01:19 PM   #6
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Can't really tell much from the photos - all you can see is some sort of encrusting - could be anything. Can you take a photo with polyps extended.

If the polyps are white - I have something similar. Still have not ID'ed it.

uknowncoral by n, on Flickr

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