Seiryu Kiryu Medaka
Seiryu Kiryu is a "tainai-guro" medaka, meaning its body looks black from the inside. It was developed from the transparent-scale line of Miyuki medaka. A glossy black body is overlaid with an external sheen along the sides (yokobikari), so its look shifts with the light. It is Certified Variety No. 33 of the Japan Medaka Association and is rated beginner-friendly. Adults are small, so they suit a tank or a shallow outdoor bowl. It is a good variety to consider if you are new to medaka.
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Seiryu Kiryu Medaka key facts
- Care level
- Beginner-friendly
- Lifespan
- Few reliable data
- Size
- About 3-4 cm (wild medaka reach up to 4 cm SL: FishBase)
- Diet
- Omnivore (floating prepared foods, live foods such as daphnia)
- Container & Tank
- White containers hide the side shine and black ones hide the internal black; a green, planted background shows both. Black containers are recommended to develop the black pigment.
- Breeding
- Side shine has widened over generations; choose breeders strong in both internal black and side shine.
- Tank Mates & Compatibility
- Peaceful and fine with other medaka of similar size. To keep the variety's traits, do not let it breed with other varieties in the same container.
- Diet & Feeding
- Give floating food that is eaten within 3-5 minutes: at least twice a day in summer, once a day in spring and autumn, and little or none outdoors in winter.
- Cautions
- Never release ornamental medaka into rivers, ponds or paddies; hybridisation causes genetic pollution of wild medaka.
About Seiryu Kiryu Medaka
Seiryu Kiryu medaka: a black-bodied variety from the Miyuki transparent-scale line with a side sheen. A small, beginner-friendly medaka. Traits, care basics and FAQ.
7 things to know before welcoming a Seiryu Kiryu Medaka
1The Inner Black Look
The defining trait of Seiryu Kiryu is "tainai-guro," a body that looks black from the inside, with an external sheen (yokobikari) layered over the glossy black. The impression changes with the lighting, the viewing angle and the individual fish. Checking photos or videos beforehand helps you confirm the look is what you want.
2Miyuki Lineage
This variety came from the transparent-scale line of Miyuki medaka and is Certified Variety No. 33 of the Japan Medaka Association. Its signature is the combination of an inner black body and an external sheen. Knowing this background makes it easier to compare it with other black-bodied or sheen-type medaka.
3Beginner-Friendly
Its care difficulty is rated beginner-friendly, so it is easy to consider as a first medaka. Still, it is a living animal, and steady water quality and daily observation are essential. Starting with a small number of fish helps you get used to the routine.
4Compact Size
Adults are small. Their small size makes them easy to keep in a tank or an outdoor bowl, but they swim near the surface and can jump out. A lid or a net cover is a sensible precaution.
5Setting Up Habitat
Place the container where it gets light and airflow, and prepare water that has been dechlorinated. Aquatic plants or hiding spots help the fish settle in. Choose a spot that shields them from extreme summer heat and winter cold.
6Water and Feeding
Feed only what the fish can finish in a few minutes and remove any leftovers. Rather than changing all the water, replace a portion at a time to keep water quality stable. If the water turns cloudy or the fish stop eating, look into it early.
7Acclimation Tips
When your fish arrive, float the bag on the water surface to match temperatures, then add tank water a little at a time. Sudden changes in environment can stress fish, so take your time. Feed lightly for the first few days and watch how they behave.
Frequently asked questions about Seiryu Kiryu Medaka
- Q.What kind of medaka is Seiryu Kiryu?
- A.It is a "tainai-guro" variety, with a body that looks black from the inside, developed from the transparent-scale line of Miyuki medaka. A glossy black is overlaid with an external sheen (yokobikari), and it is Certified Variety No. 33 of the Japan Medaka Association.
- Q.Can beginners keep Seiryu Kiryu?
- A.Its care difficulty is rated beginner-friendly. If you keep up water quality and observe the fish daily, it is an approachable variety even for first-time medaka keepers.
- Q.How big does it grow?
- A.There is little data on the adult size of this variety, and individuals vary. It is a small medaka. Being small, they can be kept in everyday containers such as a tank or an outdoor bowl.
- Q.How long does it live?
- A.There is little reliable information on this variety's lifespan, so no firm estimate can be given. Careful water management and daily observation are the basics of keeping them healthy.
- Q.Can I keep it with other medaka?
- A.Medaka are generally peaceful, and pairing them with medaka of a similar size usually works well. Avoid housing them with fry small enough to be eaten or with larger fish that chase medaka.
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Care difficulty, lifespan, size and diet — all basics covered.
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