Mariage

About Mariage

Mariage-kei is a selectively bred medaka variety developed by Japanese breeders over many years of refining tri-color bloodlines. The name "Mariage" (French for "marriage") evokes the festive harmony of vermilion, white, and black blending together on a single fish. Multiple lineages exist, including long-finned variants, and because each individual carries a unique pattern, the variety holds strong appeal for collectors. Temperament is gentle, making Mariage-kei suitable for both indoor aquariums and outdoor biotope setups. Keeping them in dark-colored containers enhances color contrast noticeably. Careful selection of parent fish with vivid, balanced markings allows the quality of patterning to improve across generations, rewarding breeders with increasingly striking results. This variety offers both the joy of breeding and high ornamental value.

Featured breeders for Mariage

🏠松島弘典 Breeder広島県0 Mariage listings亀田養魚 Breeder栃木県★ 5.0 (1)0 Mariage listings

6 things to know before welcoming a Mariage

1. 1Color Expression Varies Widely

   Each Mariage-kei fish carries a unique distribution of red, white, and black, so no two look identical. Check live photos or breeder images carefully before purchasing, and keep in mind that the pattern can shift as the fish matures.

2. 2Ideal Temperature: 15–28°C

   Like most medaka, Mariage-kei thrive between 15°C and 28°C. Guard against summer overheating from direct sunlight and sudden winter temperature drops. Outdoors, adjust placement and shading with the seasons.

3. 3Slightly Alkaline Water Is Best

   A slightly alkaline pH of 7.0–7.5 suits Mariage-kei best. Adding a small amount of oyster shell helps stabilize pH. Perform partial water changes of about one-third weekly, and avoid sudden chemistry swings.

4. 4Dark Containers Enhance Color

   Using a black or deep-navy container makes the tri-color contrast pop, especially the red and white tones. White containers can wash out the colors, so choose dark vessels if you want the best visual impact.

5. 5Easy to Breed, Selection Matters

   Mariage-kei breed readily and lay eggs on aquatic plants or spawning mops. However, fry vary in color quality, so selecting parent fish with vivid, well-balanced patterns is key to producing attractive offspring over generations.

6. 6Cost Varies with Pattern Quality

   Prices range from a few hundred yen for entry-grade fish to several thousand yen or more for prized specimens with exceptional patterning. Budget around ¥10,000–¥20,000 upfront to cover a container, filtration, and spawning materials.

Frequently asked questions about Mariage

Q.Does the tri-color pattern change as the fish grows?

A.Yes, patterns that appear faint in fry often sharpen as the fish reaches adulthood. Conversely, red tones may fade in older fish. Growing them out for six months to a year lets you appreciate the full, mature coloration.

Q.Are they better suited for outdoor biotopes or indoor tanks?

A.Both work well. Outdoor biotopes allow sunlight to encourage phytoplankton growth, which can enhance coloration naturally. Indoor tanks with LED lighting and a black background showcase the pattern beautifully.

Q.How can I produce more offspring with good patterns?

A.Start by pairing parent fish that show a well-balanced distribution of all three colors. Remove lightly patterned individuals from the breeding pool and consistently select the best specimens; pattern quality tends to stabilize with each successive generation.

Q.What is the minimum equipment needed to keep them?

A.A dark container (20 liters or more recommended), aquatic plants or a spawning mop, and oyster shell for pH stability are enough to get started. Aeration and filtration are not strictly required, but an air pump is helpful during hot weather or when stocking densities are higher.

Q.How long do Mariage-kei medaka live?

A.With proper care, the average lifespan is two to three years. Stable water quality, appropriate feeding, and avoiding overcrowding are the main factors for longevity; well-kept individuals sometimes live beyond three years.

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