Hi there! New to this forum but I'm hoping you guys can help me. I have a 90G fish only. In the mast month or so I've noticed these things growing on one particular rock. This rock was not purchased as a "live" rock so I'm pretty sure they aren't HH. They are small, white and almost fuzzy looking. They don't move, only grow. I've tried to google descriptions but can't find a pic that matches. The largest is about 3/4 of an inch long, the smallest are just pinpricks. The almost look like REALLY tiny feather dusters, but I dunno... Sorry for the poor quality pic, my cam isn't that great. Thanks in advance!