Sick guppy??

[Kelly Preussner]

I have a guppy that appears to be sick but doesn’t look sick. She is swimming/floating vertically rather than horizontally and staying basically in 1 spot. I have attached 2 videos. She is pregnant, not bloated. She will go swim for a bit and look totally normal but then find another place to just hang alone vertically.
I also just the other day had another female die and have not had a fish die in my tank in over a year. The female that died just laid on the bottom of the tank .
My water is good. I have been doing more frequent water changes since the other female was acting sick. I just did a change yesterday.
All other fish seem fine.

 

[Kelly Preussner]

Now it seems I have other females acting similar. Is there some female disease?? The males are all fine

 

[emeraldking]

If it would only be just one female and when it only continuous, it could be something wrong in the brain. But if more are having the same behavior, it could be something inferior that just relate to the females. But how weird it may sound, it could also be nothing. Sometimes it happens overhere as well but later on they are swimming normal again.