Red "leafy" thing growing on rock - ID please.

[HumanIMDB]

We aren't sure what this is but we've had it since we got the live rock...
<a href="http://www.omnipresence.ca/images/blog/AGA92/PC020007.JPG" target=_blank><img src="http://www.omnipresence.ca/images/blog/AGA92/PC020007-1.JPG" border=0></a><a href="http://www.omnipresence.ca/images/blog/AGA92/PC020012.JPG" target=_blank><img src="http://www.omnipresence.ca/images/blog/AGA92/PC020012-1.JPG" border=0></a>

Sorry, not the best pictures.

[longdangler]

Never seen the red thing before, but be careful getting rid of the green bubble algae I see on that rock. Do it outside the tank or scrape it off with suction right above it. Those spores will go everywhere.

[Rustylugnuts]

I had that on some rock that stuff is cool. I can tell you it's a rhodophyte (not that it really narrows things down much coralline algae is also in rhodophera as well). I had some on a rock in my tank too. It wasn't terribly invasive in my case and never spread beyond that rock that I had it on. I just harvested a chunk whenever it got too big.