Help identifying this growth on my rock?

[luckycat]

This thing has been growing pretty quickly in my nano...and I noticed a smaller version on the same rock, which is also in the picture.

I have to admit it looks kind of neat...

 

[Fluff]

It appears to be some type of macro algae but I'm not sure on species. If I can find out, I'll post it. It's does look like a type of Porphyra though. Looks pretty awesome. Not something I'd be overly concerned with. I hope it does well for you.

 

[luckycat]

OK Thanks- I'll let it continue to grow, neat addition to the nano...I'll also look into pictures of macro algaes to see if I can figure out exactly what it is.