Can anyone tell me what the red thing is next to the zoas ( I think that's what they are called, I'm not good with names) Anyways, some of the zoas died off and after a while, this red thing showed up, it's gotten bigger now, I have no idea what it is or how it got there, at first I thought it was a mushroom that had somehow ended up there, or maybe red slime?, I don't know. Any help would be appreciated.