Hitchhiker ID please?

Did anyone ever ID this image on the Hitchhiker thread? I tried to find out what it was but maybe missed the reply? Anyway I borrowed the photo because I can't get a clear one of what I got. What I have is tube-like thingies (technical I know) coming out of several areas in my LR. They look almost exactly like this except I havent seen any little polyp type heads, just the white tube. They seem to be spread out rather sporadically on my rock. Any ideas? I have quite a few.

I forgot to add, I touched one and they are very soft and squishie-ish. if that helps

anyone?

They are all white tubes that are bigger at the base and taper up at the ends. Nothing seems to be coming out the end of the tubes, but they are all growing singularly in different areas of the rockwork. They only have one opening.

I think i have some kind of white sponge growing on one of my turbo snail's shells too, but that one is different looking.

some of it is figi and some of it came with the tank when we bought it so i'm not sure.

it's bugging the crap out of me that i cant figure it out. i've been searching for hours and found nothing even close!

in any case, i've had the tank/rocks quite awhile and they just recently showed up