From the picture, I don't really see how you can comment on "gold patches", there are some flash highlights certainly. Y. sidthimunki very typically has a strong central stripe and checkerboard like apttern above the stripe whilst being basically silver below it. The fish pictured has similar marking below the medial stripe, typical of the B. kubotai, which is a very variable species. Consider also the markings generally, strong vertical AND horizontal marking, very typical of B. kubotai in whatever pattern morph it is wearing.