I want to know if anyone could spot the males from the females (if any). They're kinda expensive so I'm hoping I'm able to just get a pair.
There are 4 in total, I bought one of them already and I'll post the pictures below. If anyone could ID the sex of them that would be appreciated.
The one I already got can be a kept in a community if I'm not able to get a pair. I didn't want to risk buying 2 and then find out they're both male for example.They're kinda rare where I am so I'd like to have them.
Here are the 4 fish at the store:

After taking one out:


Here's the one that I bought (out of the same group):




I didn't see anyone with long pectoral odontodes, same for the cheek odontodes none of them struck me as male or female.