Can anyone help with this branching sponge

[lionfan]

http://tinypic.com/202q04 I have a problem in my reef tank with this 1/4 length sponge. Does anyone know anything about this and how to rid my tank of it?? I have all fiji live rock, I know it's a sponge because i had it tested

 

[lionfan]

I also wanted to say that it is beige in color and is very brittle, it almost seems as if it were detrites when it blows around in water column

 

[Anonymous]

For lack of a better picture I'm not convinced that's a sponge. I'm more likely to say that's a species of Foraminiferan especially from your description.

Regards,
David Mohr