Hi friends!
I have a question about one of our dwarf pea puffers. We've recently noticed a pair of nubs beneath their mouth. No other signs of distress that I can see -- still social, active and eating. The tank has two other dwarf puffers and a Florida flag that aren't exhibiting any similar symptoms.
What's really curious is that the bumps appear to be symmetrical; one on either side of the chin, and nowhere else on the body.
Might this be early lymphocystis?
Also, checking the amount of debris on your picture, it seems you are not doing cleaning enough, which is a source for itch bacteria. My usage in this case is one 30% water change per week until it stabilizes, then once every 2 week, depending on your filter. Be careful with the water changes if you decide to treat.