Can anyone identify this coral?

[mobrien1993]

I picked this up at our local saltwater store but the lady couldn’t identify exactly what type of coral it was. I was told it was possibly a star polyp coral but I don’t see any pictures that look similar to it. If I touch it or the other fish get near it the whole thing collapses and closes up really tight. Does anyone know what kind it may be this is one of the first coral I have so I’m still trying to learn. Thanks!

 

[reeferfoxx]

Looks like a green goniopora

 

[tautog83]

^ THIS