Naso Tang color

[tmkx3]

my Naso tang is a different color today. The top of his head that is usualyy yellow is a kind of pea green color and his grey body is alot darker. I have noticed that some fish change color to show aggression. is he okay? He is acying normal not being aggressive but just a little concerned :mixed:

 

[Chris27]

Like other fish, they change colors with emotion, keep an eye on it, it may be nothing at all.