I have 2 black mollies, that have been raised together as fry and are now about 4 months old. I thought one was male and the other female, so when my big tank was ready I moved the male over, to stop him harassing the other one ( which is a lot bigger than him). And to prevent any fry appearing
But - the other one seems to be male as well now. I am confused
A week ago he looked like a girl, now he looks like a boy. I have a female in a hospital tank, so the difference is clear. Anyway I moved him into the big tank as well and now the smaller one that was already there, is sniffing around - literally! His nose is permanently parked at the other ones bum.
Er - is this normal for 2 males?

But - the other one seems to be male as well now. I am confused

Er - is this normal for 2 males?