Alright, let me show some photos that are actually of
Proto. fenestratus... and it will be obvious that the OP's fish is not what you claim it to be.
See the mouth structure?
Protomelas have small mouths compared to their head and body. Look at the OP's fish... can you see the difference in size and shape?
And after looking all the various
P. fenestratus from Ad's books, I actually doubt that you even have one... based on the colors that are appearing on yours versus the various locals I've looked at so far.