Aiptasia?

[oneradtek]

yup thats exactly what my GSP look like when they start to grow, good thing to get

 

[spanko]

Better picture now. Either Anthelia or Xenia.
Anthelia polyps are on single branches.
Xenia polyps are like trees multiple branches from one trunk.

 

[r1v2c]

thanks spanko !
I googled both Anthelia and Xenia and from the descriptions / pics ... Anthelia is the winner.

 

[spanko]

Glad you got an ID on it. Now be aware that it is a fast spreader so if you can isolate the rock it is on somehow you can control its spread. Then you can even create frags by putting small pcs. of rock around it that it can spread to and you can sell them or trade them into the local fish store for credit.