Those browned out Palys are like that. Like J said they love to take over and are a NO NO in most tanks. They become invasive and are not the nicest of the crop. I would try isolating the rock if you REALLY want to keep them. They are a pain in the A** if you let them grow all over in the end. And to answer your previous question there are Zs and Ps that are just like that. They seem like they want to reach for the stars. .