My black mollie is sick?

[beautifulfish]

I have a female black mollie which I have named :joke: Today she started swimming on the bottom of the tank. Gliding over the gravel and not swimming to the top. Sometimes she will swim in the middle but rarely. I have watched her all day and I don't know if she is sick. Is she?

 

[randalizm]

if she looks like she is swimming ok and is eating and there is no noticable marks on her then she probly jus doesnt feel like swimming to the surface. maybe she just likes to be down towards the bottom.