I got coral from someone local and when I saw the mushroom on this rock I knew for a fact that it wouldn’t be going in my tank for multiple reasons including the hair algae. But just look at these massive fireworms and bristleworms. YIKES! The seller was so shocked and disappointed to know they were both in their tank they were tearing down to upgrade. So I yanked the mushroom off the rock and it split but I’m not worried as those things are virtually indestructible he’s not happy but he’s very much alive. And everyone will tank me later when they aren’t eaten or stung by these atrocities. Because there was so many of them on this little rock and they are massive.