Help sexing Spotted mandarin

[schafon]

Hi everyone, need help understanding if what I have is a male or female.
I thought that it’s a female and purchased a male but I’m not sure now and don’t want to put them together.
Thanks!

 

[Sharkbait19]

Female!
The small dorsal fin gives it away.

 

[schafon]

Thanks! Just moved the new male with the female and for now it looks like it’s ok. We’ll see tomorrow!

 

[Lost in the Sauce]

Is the male larger than the female?