myrionema hydroids

[geopod]

OK I am looking at the pic bu what exactly am I looking for??

george

and no i dont have blonde hair

[Ruth]

The little brown fuzzy things that almost look like mini feather dusters all clumped together.

[Snappy]

You might try pulling the rock out, cut off what you can and then syringe a little bleach into the infested area while keeping the frag moist and protected with a SW soaked cloth. Let sit for about 5-10 minutes, rinse well and put it back in. Wait an hour or so and do a 10% water change to make sure the traces of chlorine are subdued. Might be worth a try. This of course would depend on your sense of adventure as well as where the the pesky beggars are located in relation to the coral. If that scares you maybe try using straight PH buffer, or something else strong that might kill it.
If it is a bad idea, you never heard it from me.........