[helene schoubye]

I am not sure why they should not be nagyi.
The colours are a bit funny, but this could be the photo. And its not a fully bright coloured male, but it could be a male with a bit undeveloped colouring yet, or the situation doesnt allow for a fully colouring male (other males?)
The one to the left is a female, the other one does not show any black white stripes really, which is what nagyi would not do. Also the male in the caudal fin has this colourless bit at the end, isnt that typical nagyi ?
Plus the pectoral fins are not long, – nagyi is also quite short, and have this black spot in them, which I think I can barely see on the photo also.
I am not very good at identifying, I often seem to get it wrong, so its just my small opinion 🙂 .. but I wouldnt be sure its not a nagyi.
Whether its a nagyi ‘kuantan’ or ‘cherating’ depends on the colour of the spots in the caudal fin. If they are clearly white its kuantan, if clearly blue its cherating. This is also often difficult to determine on photos