Green Circles On Rummynose Head

hello!

I purchased 15 rummynose and have put them in my quarantine tank. all of them have been doing well so far and slowly coloring up. they're eating normally and pooping a lot. however one of the rummynose, who actually has the best color in the tank, has green circles on it's head. I noticed that other rummynose have a similar circle outline but it's not colored up yet. (these fish still haven't colored up yet)

I was wondering if this was normal and if not what disease it might be? I took some pictures the best I could.

thanks,
ben

 

I think its just a feature or rummies, all mine have it under certain lighting.

 

I think its just a feature or rummies, all mine have it under certain lighting.

I hope so! the circles are pretty perfect loll

 

Mine have blue green shimmers and patterns under certain lighting as well. I have 15 in my 90 gallon, great choice!
I’d keep a close eye on them though.

 

than

Mine have blue green shimmers and patterns under certain lighting as well. I have 15 in my 90 gallon, great choice!
I’d keep a close eye on them though.

thank you!