Here is a photo of the colorful male – I post it here as it shows the caudal fin rays clearly and there appears to be some extension of the middle caudal fin ray(s) which is a characteristic of sumatranus. Perhaps, as yet, not fully grown out but present at this sub-adult stage in any case.
[IMG]http://imagizer.imageshack.us/v2/xq90/901/Cyqemr.jpg[/IMG]