Lichen-Like Stuff on Live Rock?

[brittant]

Today, I was looking in my tank when I saw this light green stuff (kind of like lichen) on the surface of my live rock (which already has green coraline). I'm pretty sure this is a new development in the last week. I'll post a picture when my camera batteries are done charging, but any idea of what it might be?

Thanks guys for all of your help! You're all quite wonderful. :)

 

[Bifferwine]

I was going to say it sounds like green coralline, but since you don't think it's that, I don't know and will wait on the pic! :)

 

[yote]

2 things come to mind when you say it looks like lichen.Number one being Bryopsis,which is a royal pain to get rid of.
And Number two is hair algae.It's also a pain,but nothing like Bryopsis.

But lets see the pictures before we get too far into it.

 

[brittant]

Almost done... But Yote, it certainly isn't either or plant-like... Just... Weird and flaky looking.

 

[yote]

Possibly plating Coraline. But again,just guessing until we can see it.