Jackson with possible mouth-rot???

[AROWANA MAN]

Well I was just cleanig the area around my males free ranging area, and when I went to get him I started to notice that the lining of his left side of his bottom jaw it looked kinda pinkish brown, and a little deteriorated.
will have pics up later.

 

[Justin Carl]

Sounds like it could also be the temporal gland.
Please post pictures.