Something else has caught my eye: I have never noticed – on any of the P. nagyi photos I have seen – that the male’s chin and throat is also shimmering in the same iridescent emerald green as the pectoral fins. I just noticed it on some photos of my male. The colouration reaches the ends of the gil covers.
Is this a feature in all nagyi-males, or is it only to be seen in the Pekan Nenasi form?