Need help with identification.

[cORALfREEK]

I found this on a pc of my live rock. Its been growing rapidly. At first it was just one green dot and a 1/8" in size. I happened to look at it with a light last night, there were tentacles similar to what an acan would.

 

[cloak]

Mycedium?

 

[cORALfREEK]

I think it might be, after looking at a few pics. I'll be able to tell for sure once it gets bigger.

 

[garygonzales]

there is a lps id forum too..