[Sexing EB jack dempseys]

Hello! I was hoping for some assistance in sexing my electric blue jack dempsys. When I look at each fish independently I'm inclined to think theyre both male, but when i compare them like this the larger fish's anal fin is SO much longer. This picture doesn't even really do it justice they just weren't cooperative this morning. Any help is appreciated

[Does Temperature Impact the Ratio of Males to Females?]

Was just having this conversation today and found this 🙂

https://www.researchgate.net/publication/317936826_Influence_of_water_temperature_on_phenotypic_sex_ratio_of_an_ornamental_fish_Poecilia_reticulate