no picture, help me identify something wierd

[tkhawaja]

Unfortunately, my father-in-law is borrowing the digital camera while on vacation. I have something very strange growing from the very tip of a Tonga branch rock. The rock is bare and shows white. This must be some sort of invertebrate as it seems to have a mouth. Here's the best I can do description wise:

It's orange and looks soft but I haven't poked at it with a finger to confirm. Seems to have some sort of a mouth and antenae. The "antenae" are quite small, I would say only a few millimeters. The body seems to be growing in constricted "knots". It's definately growing because the convolutions in the body have increased. And it is alive as the antenae seem to move on their own. Plus yesterday the "mouth" was facing sort of towards the front and today it seems to have "grown" towards the back.

I have looked in all the books I have and not found anything even close to resembling it. Any links to pictures would be much appreciated.