Orange Death?

[Kronk]

Thanks for the replies really appreciate it i couldnt find anything when i searched... anyways i am starting to doubt my original identification. I have been observing the orange in my tank for a couple of months and it doesnt really have the same slimy appearance as the pics, instead its very flakey and hasnt spread much at all. The one thing that had me concerned was that it seems to be growing ON other coraline and doesnt grow on its own.
Anyways I am going to leave it out of the tank for a couple weeks then put it back in.