These fishes were procured from the creator (本家) himself Kikuma Medaka.
The Shukougiku or 朱光药 was only released in 2022. It features a chromatic shine from the head to tail with long blue fins. The current batch of fishes are extremely high grade and is selected by Kikuma San himself.
Despite the price, it is a Medaka fish for all serious collectors! This fish is sold in a pair.