Q-tip Sponge??

[rf]

I have a white unknown growing in my tank all over. It appears to be a type of sponge, but I am unsure. I have looked all over for identification but can't find anything.

Description:

White, and look like the head of a Q-tip. Mostly attached to live rock, and a few to the back wall.

Any help as to what it is and if it is friendly? Right now I haven't noticed any problems with it, and I don't mind keeping it in there as long as its not bad.

Thanks

[boxfishpooalot]

does it look like a fuzzy white banana?

[rf]

Yeah, but really little like a q-tip.

[boxfishpooalot]

Fat on the bottom,skinny on the top?

If so thats reef safe sponge of some sort. Cant remember the name but sombody here on rc will tell you .