Does anyone know what this may be

[paulajo1315]

I found this in my saltwater tank. It has live rock and sand. It is about 6 month old setup. First time I have seen this

 

[paulajo1315]

I moved it and got a better picture. Is this an xenia?[VIDEO]

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[flower]

I don't know what it is...but it isn't xenia, at least not the kind I ever seen.

 

[dmanatee]

looks like some kind of polyp, but I could be wrong