Happened to walk by a “nishikigoi” competition one weekend in November being held on the Tokyo Dome premises.
I did not know how much these fish went for but just that they were generally expensive. I have looked it up.
This gold one is 100,000 yen (about US$1,000) as is this one with lots of red with some black against white, while this is 80,000 yen and this 35,000 yen.
From the organizer’s website showing “winners” of the 2011 competition.