My pseudopimelodus bufonius randomly changed from brown and black to yellow and black then he changed back a day later is that normal here are some pictures for reference
Pseudopimelodus bufonius changing color
- Thread starter Lazybum34
- Start date
Probably mood caused the darker color pattern looks more relaxed last pic.
Judging by your multi-toned gravel, he probably does not know what colour to blend into.
Yes, fairly common based on a number of things including mood.
IMHumO, it was a good joke but don't mind the smart-asses, you need not to make excuses for your taste 
There is nothing unexpected about the color changes. As peers above said, lighting, time of day, season, diet, mood, age can cause such color variations.
There is nothing unexpected about the color changes. As peers above said, lighting, time of day, season, diet, mood, age can cause such color variations.