Thanks everybody and especially Sherry
cynarina lacrymalis aka doghnut coral would be awesome. Look what I found (I just like to ID so I know how to take good care of each coral):
The extent to which the coral expands its tentacles is a good bio-indicator as to your tanks overall water parameter level. If the polyps extend during the day for the most part and extend fully, then your water is close to ideal for the most part.
http://www.associatedcontent.com/art...g2.html?cat=10

Makes me feel good. This little guy is out almost all the time