Ok number 1 what zoa is this. It has a maroonish center with yellow lashes. Srry not really sure how to take a better pic.
Number 2 is that cyano bacteria on the rock? It seems hard or is it coralline algae?
I picked this rock up it has about 38 polyps on it for $15 their is about 10 polyps that just won't open for some reason. And other looked liked they died off if you look at the upper left hand side of the rock looks like the stem of a polyp but it is just flapping in the current no head. Also a lot of very small zoas and they are scattered all over this rock. Not all in one patch.
I dipped them for ten minutes in Coral RX but is their anything you can see wrong with this rock and zoas. Are they dying or were they dying and they are coming back?