Need some help with an ID on this first picture. It's a red sludge that's creeping across one of my rocks. It has a few white areas as well. I'm assuming sponge, but it's beginning to encroach on some zoa colonies so wondering what my best course of action is. Second, I picked up a colony of Green Pocillopora coral only to find out it's the Xenia tree of SPS. Is this true and should I get rid of it?