Aptasia or something else?

[JmFissel]

Just got some new live rock in and I can't seem to be able to identify this hitch hiker. They are in clusters the picture shows one closed and one open. The don't seem to have a stalk as I have seen in pictures of aptasia.
Any help with this is appreciated.

 

[Sugar Magnolia]

It's a harmless coral. Phyllangia americana; cup coral. Very common hitchhiker on live rock.

 

[Lateralus]

Well was gonna say ball anemone but Sugar^ nailed it.

 

[JmFissel]

Thanks for the rapid answers. I've been lurking around these forums for a while now - so much to learn!

 

[Sugar Magnolia]

Be sure to stop in the New to the Hobby forum and read through the stickies at the top of the forum.

[Welcome]