Hmmm, Looks Cool!

[Pisces3473]

I'm sure somebody out there knows this, anybody recognize it? I found it growing one of my LR while I was re-reef-scapeing my reef scape. I also found a free floating Zoa, however in my attempt to recover it was blown into my 10 gallon abyss... Here's the pic

 

[Longspitt]

Hmmm kinda looks like sun coral skeleton to me

 

[czwicky]

Skeleton of a favia. Neat looking in the rockwork. I have quite a few coral skeletons in my tanks. I like the contrast they provide

 

[Pisces3473]

I was hoping it was growing. You're right though still a cool feature!