just an observation,
the way it is all stalk and very little head is indicitave of its lack of sufficient light. its not overgrowing its looking for more light. Sarcophyton sp. like light, the more light they get the wider the head and more ripples it gets on the head. the fact that that leather is mostly stalk and almost no head shows that you dont have enough light for it to flourish the stalk extension is a survival technique exhibited by corals reaching for light.
I wouldn't frag it now, as it is expending extra energy to reach for light. it may not have enough energy to recover from fragging properly.