I noticed that my female panda cory's entire nose recently turned White. Numerous times I've seen her moving quickly around the tank with the other panda cories around her; it almost looks like a ball of cories actually. I think she may have hit her nose and this is the result. She is also very aggressive when scouring the bottom for food, just sticking her face right in the pea gravel, she always has been so that's nothing new. It covers her entire nose, bit is NOT fuzzy. Her barbels are all intact and she's behaving normally. Just monitor it for now?