Clown face turned white overnight.

[coltonwsmith]

A friend of mine sent me a picture of his clown, asking for suggestions, but I've come up clueless.
His clowns face turned pale supposedly overnight, however is swimming and acting normally.
Any ideas?

 

[Macscale]

Well, sometimes fish loose color when they go to bed. It happens to mine.
IME when my clowns face turns white, he's really hungry, because food fixes it. I've gotten to know mine well though.

 

[jeh1487]

It happens when they arnt eating enough