Is he eating have you noticed anything else regarding his health what about pooing is it normal the reason for asking is it could be bloat ,which is serious it could also be constipation but at the moment try feeding him blanched shelled peas.
Fungal infection its common for these fish to get it and its more then likley it will die from it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.