Male Ar Female Guppy?

[madmom]

I've also noticed thier top or dorsal fin can be longer and narrower or more flowing in the males.

 

[kribensis12]

The whole thing is the males have a gonopudium( the one eyed snake) then it is a male for sure( unles the woman is a cross-dresser). Also, males are usually smaller and more colorful.The females are usually bigger, less colorful, and a straight pionty fin pointing straight down( anal fin)