Hello, thank you for your reply. I have looked and she isn't like that, at all, I do not believe.
I have, however, attempted to take a photo of her from the top. I have also attached a photo of her finnage from just the night before. There was so sign of fin rot, I check that every night, and I checked her in the morning just before I left to go to town. I was out three hours and returned to basically all of her Dorsal fin missing. I cannot see it or find it in the tank anywhere and there isn't anything she could have ripped it on. In the instance that she could have ripped it off the HOB filter, I do not think it was possible as it was not running at the time, and also there is only tiny slits in it. I have been notified that it could be an extremely rare, but real fst fin and body rot. Since the Dorsal fin has gone, I am worried it will not grow back even if she lives, as half of her back has gone, too. As a result she can't swim upwards properly, which is a concern for me.
Before, taken the night before: (Sorry they aren't focused - crappy phone camera.
Sakura8 has messaged me back on theo ther thread, and I quote:
You're right, after looking at the pics of the filter, it does seem difficult to imagine her getting caught up under it. I was thinking of the Marineland filters which hang down quite a bit. Based on the new things you remember seeing, it does seem like now we're looking at a very virulent bacteria, possibly vibrio.
The problem is... I admit that I was not and never have been prepared for an illness THIS bad. And I probably wouldn't be able to get the medication for a few weeks, if New Zealand allows it, because they can be pretty expensive.
I'm not sure if I should euthanize her, or make her wait one-two weeks for medication. I'm not sure it would be very.. humane.