I have Black Mites on my Zoa's, Zoas are closed and have been for over 3 weeks, spotted these guys on my Zoas this evening. They do not resemble Zoa spiders, way smaller and black. Any idea what they could be, they are too small to get a picture, longer than they are round and smaller than a Tisbe pod by more than half, they do hide when I shine a light on them.