Cool random zoanthid growth

So while admiring my tank today and looking for my pom Pom crab, I see two random polyps growing on a rock nowhere near any of my zoas/paly colonies. In a little nook of a rock there they were growing. I look some more and on the other side of the tank, I spot another. I thought these things had to branch off each other but apparently not. It's also weird because these are the rocks that were out of water for a month and the ones I also aquascaped together.



I also noticed now on one of the rocks a small white tube with a pink duster looking type thing coming out of it. I'm assuming it's a feather duster but it looks just like a really small coco worm. I'll try to get pics, all I have is an iPhone and they are in weird spots.