?? If you're in the Philippines its a better chance that this macro will survive reef temps, so thats a good start at least. Can you get a better pic? Preferably with the macro in some water, good light, and try to do a close up of the fronds. IDing it will probably be easier from a pic like that.
As a wild guess.. it has the fine structure and the overall appearance of a small Caulerpa species, perhaps C. verticillata, though I'm not sure its distribution extends to your waters. Try that name on algaebase.org's image search.