Youkihi Medaka appraisal

A representative red-colored variety that led Japan's medaka boom. The depth of orange to orange-red coloration and uniform coloration across the entire body are the core of selection, with more intensively selected lineages showing deeper and more stable color.

解説用イラスト: Youkihi Medaka — AI-generated illustration for explanation. Not an actual listed individual.

What determines the price

Body Color Depth (Intensity of Orange-Red Coloration)
High
The intensity of orange to orange-red coloration is the core of evaluation. Individuals with deeper orange-red coloration compared to pale orange are considered evidence of repeated selective breeding.
Uniformity of Body Color
High
The more continuously the color extends from head to abdomen and fins, the higher the evaluation. Individuals with whitish abdomens or dorsal areas tend to show lower uniformity of coloration.
Body Shape Balance
Medium
Individuals with straight spines and well-balanced body proportions receive high evaluation.
Strain Stability
Medium
Lineages refined through multiple generations of selective breeding tend to produce stable coloration consistently in offspring. The clearer the lineage information, the greater the reliability.

Appraisal points

Assess the depth and uniformity of body color.

Good:: From head to tail fin, orange-red coloration displays uniformly without interruption.
Caution:: Individuals with whitish bellies or uneven coloration may indicate shallow selective breeding for color intensity.

Assess fin condition and coloration.

Good:: Dorsal and tail fins are intact, and coloration extends to the fins.
Caution:: Individuals with significant white or transparent areas on the fins may receive slightly lower overall ratings.