Ginrin

Ginrin (銀鱗) is a Japanese term used in the context of koi (ornamental carp) to describe a specific type of scale that exhibits a metallic, sparkling, or reflective appearance. The word literally translates to "silver scales" or "silver lining scales."

The ginrin characteristic is a highly sought-after trait in koi breeding and judging. It is not a color, but rather a structural characteristic of the scales themselves. The ginrin effect is caused by guanine crystals within the scale structure that reflect light.

There are several different types of ginrin, classified based on the extent and pattern of the reflective scales:

• Diamond Ginrin (Diamond Gin): The most common type, where each individual scale has a sparkling, diamond-like reflection.

• Pearl Ginrin (Pearl Gin): Features a pearly, iridescent sheen on the scales.

• Beta Ginrin (Beta Gin): This type displays ginrin only on the edges of the scales, creating a distinct, outlined effect.

• Kado Ginrin (Kado Gin): Ginrin that appears only at the edge (kado) of each scale, similar to Beta Ginrin but often more pronounced.

The presence and quality of ginrin significantly impact the overall aesthetic appeal and perceived value of a koi. Breeders carefully select parent fish with desirable ginrin traits to enhance this feature in subsequent generations.