Are these peacock basses pair or same sex?

[Andrew Kim]

I have these 2 peacock bass Melanie Xingu. I have plan to breed them.
So I wanna know they are a pair or not.
How do you guys think about it?

 

[aroijuana]

Posting the underside of each fish would help a ton.

 

[Andrew Kim]

Posting the underside of each fish would help a ton.

Ah Thank you.
These pic are their anus...