Could you ID please?

[X the Outsider]

On some of my LR I've got these clear tube-like figures protruding from the rock. They don't move around, but they seem to be popping up all over the place. What could they be?

 

[Fluff]

Clear tubes? Hmm, the only thing I can think of off the top of my head, and with no picture would be vermetid gastropods. They are a snail that lives within the rock. They form small tubes to send out a mucas trap to collect food particles/detrius.

 

[X the Outsider]

Someday I'll break down, and get a camera. So many other things I need first though.

Thanks for the reply. I'll do some studying on those to see if that's it.