Wow interesting I notice they are a few yellows being sold on Facebook I wonder is the food the reason they are yellow...because i remember yellow being the rarest color to get... i have kept a good bit of barred and colored Cits Midas and my barred always seemed a lot more aggressive and they ate small fish when my colored ones were mild mannered and never ate fishAnd here's a yellow midas that I used to own.
View attachment 1322516
View attachment 1322517
Which turned out was being fed a low cost commercial farm feed. Once his diet was changed to a more premium food, his color changed to this;
View attachment 1322518
View attachment 1322519
The fish shown above is orange and white, not yellow. Commonly referred to as a creamsicle color morph.
True yellow A. citrinellus morphs are fairly rare, Rapps imported a multi colored wild midas years ago, that was partially yellow, but I believe that it died not long after being sold. Behaviour will be the same as any other cit, color doesn't have a behavioural impact in domestic midas.
James, your fish was simply a faded out creamsicle, that gained color as it matured, which is quite common with juveniles of that color morph.
A yellow adult A. citrinellus is a whole nuther thing …..