ID Please: algae or something else?

[revnull]

This started out as a small "sprout" on a piece of live rock I bought years ago. In the past year it's gown quite a bit. It greens up in the light and bleaches out in the dark. I've had some sprout out of my sand bed as well. When I've pulled it out, it seems to have a root system. It's not invasive and I kind of like the look of it. Debating on transferring over to my new tank.

Any info would be greatly appreciated.

 

[MarAquatic]

Halimeda maybe

 

[revnull]

Looks like it.

http://www.liveaquaria.com/product/prod_display.cfm?c=3468+490+656&pcatid=656

Thanks! Does anyone want some? I'm going to start taking down my old tank this weekend.

 

[rygh]

I might. Location?
My fuge needs some different algae types.

 

[revnull]

Morgan Hill

 

[gabloo]

If you have plan to visit San Jose area, I would like to take some for my refugium