Need a Quick ID

[jkef2010]

Been on my rock for some time now has a Green tint to it very attractive w/e it is.

 

[DaveK]

It looks like an apista anemone to me. These can become a major problem. Kill it now.

 

[Ian Eisenberg]

Where did you get the LR?
It looks more like a cup coral. If when it retracts it looks like this:

Then you are fine. I have them in my tank (got my live rock from TBSaltwater) and they don't do any damage and don't really spread.

 

[PSU4ME]

I'm leaning toward Ian here...... The aiptasia I've seen don't look like that.

 

[Oxylebius]

My initial thought was a Ball Corallimorph, Pseudocorynactis (ball anemone), but I'm leaning towards Ian's ID of a cup coral.

 

[jkef2010]

Yea its does exactly that and looks just like glad its not aptiasia. I have a few little Aptasia In the tank now i'm just waiting for it to get big enough to get rid of it and it don't look nothing like the aptaisa