unidentified growth on live rock

abeachgrl

Hobby? ohno, it's an obsession!
Jul 5, 2006
9
0
0
Virginia Beach, VA
I just purchased haitian live rock from my LFS.
There is a growth that I cannot find any other pics of on the internet.
:help:
It is a moss-green color. It is very light and airy and spongy looking. It is not flat on the rock but sticks up, moving in the current. I couldn't take a very detailed pic of it.
Is it common or dangerous?
Do I want it in my tank?

HPIM0709.JPG
 
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sounds like hair algea or a form of sponge...
 
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