what is it, revisited.
I cannot post a picture because these little guys are two small to photograph. I will do the best I can to describe them. First off, they appear like little tiny brown feather dusters. A feathery appendage on a stem. Second, they are not growing apart from each other, they are growing in clumps, in several spots of liverock. They do not appear to resemble any aiptaisia I have seen and the 9 peppermint shrimp do not bother them at all. I have had the liverock about 2 months now. This is the first real growth I have seen on it except for the coralline algae.
I have not seem them close up like the barnacles did, they seem to stay out all of the time.
Best estimate, would these be feather dusters? There are about a couple dozen of them.