It is a member of the Gorgonia family. It needs lots of flow and not very bright to no light. I'm guessing by the algae I see that you might be having a phospate or nitrate issue. They are very sensitive to both. That is probably why it is not opening for you.
First you need to see the polyps. If it is what colt thinks it is cyclopeeze would be a better choice. I would start with some cyclops and frozen rotifers until you can see the size of the polyp.
Other than that Clam Food and Sea Fan food would be my choice.
Well, it seems to be doing waaayyy better now:bounce1:. Seems like Diodogorgia, like Colt said??
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