Male molly?

[16gallontanker]

All this time I thought I only had females but now I'm not so sure.

 

[gwand]

Males have larger dorsal fin, more streamlined body and pointy anal fin.

 

[Colin_T]

Males don't always have longer/ larger dorsal (top) fins. It is a male though, you can tell that by his anal (bottom) fin, which is long and thin and called a gonopodium. Females have a fan or triangle shaped anal fin.

 

[16gallontanker]

Ok thanks for the info

 

[emeraldking]

All this time I thought I only had females but now I'm not so sure.

That was already clear on your former photo.

Males have larger dorsal fin.

Doesn't have to. That's just the case in sailfin mollies.

more streamlined body

That depends on the kind of molly.