Identification help!!

[FishyDP]

My green palys closed up in the last week or so, and they're not opening back up. Other corals in the tank are doing fine, aside from a few zoa frags due to a nudibranch that I found. I picked up the frag to inspect it and noticed this purple and orange mat starting to cover the frag. I don't have coraline algae in my tank so I'm not sure what this is? Excuse the photobombing coral beauty.

 

[DSC reef]

That coral beauty looks upset the zoas are not open;Hilarious I'm not sure what kind but it looks like a type of nudibranch? Does it move? If it is I'm not sure its eating the zoas as some are sponge and tunicate eaters.

 

[FishyDP]

Thanks for the response, and you might be right about him being upset . It doesn't move. The best way I can describe it is that it looks and feels kind of like a GSP mat. I was able to peel some of it off the frag. I don't want to confuse what we're looking at here.. I mentioned nudibranch but there are none on this frag, this is just a purple and orange mat growing on it.

 

[DSC reef]

Maybe a type of sponge. If its keeping the zoas closed I'd try to remove it. Nice colors though, lol