Here is another picture for you experts to ID for me

[sn8kbyt]

This is the only one I can see this formed and could get a picture of but there are several other "orange spots" forming in the tank that don't have the black spots in them and are about half the size.

 

[mr llimpid]

That is cool, I just love all the things that pop out of these rocks. Must are filter feeders and don't live long in our systems. Not sure what you got there, just enjoy it while you can.

 

[sn8kbyt]

Button tunicate I was told. It has actually grown and additional 3 outer round sections around the center since I took that picture. I was watching it tonight during feeding time and could see it contracting and closing...was pretty cool!