Any ideas on what this discoloration could be?

[Ongo]

I'm wondering if this is some kind of fungus starting off. It's the same colour as his skin only brighter, with a dark rim.

 

[Ongo]

Pics here

 

[salty dog]

Very strange circle, I like your chams coloration

 

[Ongo]

Very strange circle, I like your chams coloration

Thanks, he's gotten pretty colourful over the last month or so.

Any ideas what it is?

 

[Mawtyplant]

Pics here

Can be lot of things, but too me it look like he is gonna shed soon! Keep an eyes on the evolution! it can also be a burn (small light burn can have this light coloration) i doubt about the fungus/dermatits because its usually more yellow ish, brown or black.

Keep up updated, if you want you can clean this up with chlorexidine but if its a shed i dont know if it can interfere with the process!