what is this?

[thelitone]

does any one know what this stuff is that is growing on my live rock? it looks a little greener than it actually is, it is more yellow than green. does anything eat it? if so, what eats it? i was told it was an invertebrate of some sort but not sure.
thanks
Wil

 

[mschrissygil]

It looks kind of like dying hair algae to me.