CSB or not?

[new2saltyfish]

Looking to purchase a CSB and came across this one for sale however i don’t see a purple dot on the tips and remember reading that ones without a purple dot can be rbta’s that just color changed and can revert in time. What do you all think? Real, or fake?

 

[Seapets]

Looking to purchase a CSB and came across this one for sale however i don’t see a purple dot on the tips and remember reading that ones without a purple dot can be rbta’s that just color changed and can revert in time. What do you all think? Real, or fake?

View attachment 209278

That looks like a rainbow

 

[new2saltyfish]

That looks like a rainbow

I’m questioning myself. Here are a few more. My csb that i know lineage from has purple dots at the tips.