tentacle

I have no pics. just a description. somthing comes out from the rock. then goes back in. almost like a worm. Does not look like a bristle worm but could be a diffrent type worm? just looks like one long tentacle. sorta like a tentacle from an anenome. whitish/somwhat transparent in color. What could this be?

 

Just one tentacle? If there's more than one, I would guess spaghetti worm, as that's nearly what they look like.

 

+1 Spaghetti Worm. Harmless feeder eating junk off of your rocks.

 

just one tentacle from what I see.

 

Yep. I've got a few. Looks like a white noodle coming from a hole in the rock.

 

You can google peanut worm too, or look in the stickied threads, they look like a small worm/tentacle coming out of rock.