What's this on my live rock? (pic included)

[bassetbros]

I bought about 10 lbs of dry base rock yesterday and noticed some type of vegetation attached to it. It looks like some type of grass but I'm no botanist. What do ya'll think?

Thanks and God Bless,
Basset

 

[lando]

Maybe a closer pic? I can not see it too well.

 

[bassetbros]

here's a little closer pic. Any help?

Thanks,
Basset

 

[karlseith]

Looks like dead caulerpa or some kinda macro algea to me but its hard to tell.

Karl

 

[lando]

I am thinking some kind of macro as well.

 

[phat742]

yeah that's dead caulerpa.