Mold varieties are WAY out of my comfort zone, and I'm only aping what I've read elsewhere. Hopefully someone who actually knows something will come along and correct me.
I think that is a Mucor mold known as poil de chat or cat's fur. I don't think it's dangerous, but it can cause a bitter flavor. I'd probably do local treatments with vinegar saturated with salt. You might want to lower your humidity also. hopefully Google and a search of this site will give you some more information.
Larry