ID Please

[mikeclarke]

Hi there,

I moved a piece of live rock today and found this...



Is it bad? What should I do with it?

I also have this furry purple stuff growing on a piece of live rock. Any ideas?





I also have noticed a baby blue worm that looks like a thin ribbon made out of snot. It comes out of a hole in the live rock at night and floats around. I don't have a picture but is it harmful to coral or fish? Should I just put some epoxy over the hole?

Any advice would be awesome. Thanks in advance.