I'd say clove polyps too. I had little blue ones, which are quite pretty, but they do detach and end up all over the place. The blue ones I had stayed small enough that they really can't shade anything out, so it was starting to make some cool cover for a lot of the rocks when I had to take down the tank they were in. Like a lot of softies, it doesn't take much for them to thrive and possibly thrive too much...