Yours is sensitive? I couldn't kill mine lol. I got a very very small frag (1/4") when I first got it, got it to about 1/2" then dropped a 20lb rock right on top of it when I was aquascaping. It shriveled up to nothing...just a speck and then bounced back like no tomorrow. Grew to about 5 stalks and is about 3" and very bushy. I cut two stalks of it recently because I don't want it to get out of control.
Lol, I had the same thing happen, just a spec of tissue and I saw something moving and was like no way. I say sensitive because if damaged a huge piece may die, but yes regrow. Such a strange coral. I put mine on its own rock so I can move around when it gets bigger.