Identifying the sex of bolivian rams

[zenmaven9]

Hi

I'm having doubts about my two Bolivkento4 rams being a pair. Initially, they were inseparable, always swimming together and defending themselves against my two angels. Now, they're keeping their distance.

One of them is being particularly aggressive, flaring its Sprig and nipping at the other's fins.

If I can figure out how to send a picture, would anyone be able to take a look and offer some advice?

[zenmaven9]

I've got two Bolivkento4 rams, and I'm worried they might not be a pair after all. They used to stick together, fighting off my angels as a team, but now they're separated and one's being really aggressive - flaring its Sprig and nipping the other's fins. Can someone help me figure this out if I send a pic?