I have two black and white false perculas, one male and one female. The female had flukes about a month or so ago. Now, when I looked at her, there's some kind of dark red slime or film on her underside, just in front of her rear pectoral fins. It wasn't there yesterday. I have been dealing with a bit of red slime and we thought she might have gotten some on her but that wasn't it. We then thought she might have injured herself on a hermit crab shell (they're both very aggressive toward hermit crabs) but we don't think it's blood. Does this resemble any kind of parasite or disease anyone has ever heard of?