I thought those buggers looked familiar, I can attest they grow like weeds, just watching the foot how it stretches out man they don't make a mat as much as they stretch from point to point then grow to fill in the gaps. I noticed have quite a bit of green to them as well, made me think "Pink Lemonade Zoa"

http://img43.imageshack.us/img43/6746/mikezoa1.jpg
Although the frags I did cut from the bottom of the rock are lacking green, perhaps it grows in later.