Growing white branches

[crazylikeafish]

Had this pop up on some live rock. It's grown pretty fast, from just a little white nub to stretching out about 1/4 inch from the rock. And it's WHITE, WHITE. Very bright. Can anyone ID?
Thanks

 

[ophiura]

That is quite possible an "arborescent" (tree like) foraminiferan. Basically a filter feeder and nothing to worry about, though they can leave sharp splinters in your hand should you handle the rock.
To know for sure, it would require a clear picture

 

[yosemite sam]

Originally Posted by ophiura
http:///forum/post/3030286
That is quite possible an "arborescent" (tree like) foraminiferan. Basically a filter feeder and nothing to worry about, though they can leave sharp splinters in your hand should you handle the rock.
To know for sure, it would require a clear picture
Yup, that's what it looks like to me, too.