Auratus
Why am I browsing a fish forum at 2am?
If you look at the first pic you can see the red right on the base of the tail and it matches in your pic. The rays on the tail also match up... I think it's the same fish
. Marbles are unpredictable 
. Marbles are unpredictable 

But, now that I know that marbles do that and that it's normal, I feel better. Great looking fish!
Ureka!
