Female or male

[John!]

The reason I ask is the male won't tolerate it and it hides all the time, appears when feeding but gets chased immediately back into hiding, only these 2 fish in the tank.

 

[John!]

I an certain its a male, had a good look and its developing a lyre tail which it didn't have when I got it.

 

[Larry Rogers]

How old is specimen? Appears juvenile to me in pictures. may be too early to tell or a tertiary male.

 

[John!]

The definite male has stopped chasing the other one and is displaying as they do when breeding. The suspect one has turned bright yellow