Green spotted Puffer has changed colors

[Puffer Chick]

His belly is bright white as it always is. But i have noticed the difference in his yellow corloring. He has always been a darker color, i would say almost greenish except for a bright yellow florescent color on top of his head. And now he is all bright yellow and no green color at all. Is this kind of color change normal for the puffers as they age or grow?

[Babalu]

hey hey ...

Well my gsp was a dull green when first got him but after a week or say got more bright yellow ... really shiny looking Although recently the clown fish been hassling him a wee bit and not been as bright .. but still
green patch on head and pure white belly -.-

[Puffer Chick]

And that's the weird thing I've had him for 2 years and he has never been this bright before