White Medaka
White Medaka is one of the foundational improved varieties, known for its pure white body that gives it a clean, refined look. The bright white coloring stands out beautifully against aquatic plants or dark substrate, making it a good fit for both indoor and outdoor setups. They're calm by nature and tend to school together, so keeping a small group rather than a single fish lets their natural swimming behavior show. They eat readily, taking to both prepared fish food and live foods like daphnia without fuss. Hardy and straightforward to care for, White Medaka is a popular starting point for anyone new to keeping medaka.
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- Body Type
- Scale Type
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White Medaka key facts
- Care level
- Beginner-friendly
- Lifespan
- 2-3 years
- Size
- 2-4cm
- Diet
- Artificial feed, Daphnia
- Container & Tank
- Can be kept in an outdoor biotope or an indoor tank without trouble. The white body shows up better in a dark-colored container.
- Water Temperature & Quality
- Very hardy and disease-resistant; adapts widely to 5-30°C and neutral to slightly alkaline water, making it ideal for beginners.
- Diet & Feeding
- Feed prepared food as the staple with daphnia. Leftovers foul the water, so give only what is eaten within a few minutes.
- Breeding & Egg-laying
- Breeds readily and spawns actively once a spawning medium is provided; fry survival is high, so it suits a first breeding attempt.
- Tank Mates & Compatibility
- Gentle temperament; mixes without trouble and can be kept with other peaceful medaka of similar size.
- Housing
- Note that it is hard to see in a white container
About White Medaka
A foundational improved medaka variety with a striking pure white body. Beginner-friendly and hardy, living 2-3 years and growing to 2-4cm, with an easy appetite for both prepared and live food.
7 things to know before welcoming a White Medaka
1Tank Size and Water Volume
At just 2-4cm as adults, White Medaka can be kept in small tanks or outdoor tubs. Still, avoid cramming too many fish into a small volume, since limited water can swing in quality quickly — give them a bit more room than the bare minimum.
2Visibility of the White Body
Because the body is bright white, White Medaka can stand out more to predators like birds when kept outdoors. Providing floating plants or a shade cover gives them places to retreat and feel secure.
3They Settle Better in Groups
Medaka are schooling fish, and White Medaka behave more naturally and calmly when kept with a few companions rather than alone. Aim to keep at least a small group together.
4Feeding Routine
They readily eat both prepared fish food and live foods such as daphnia. Feed small amounts a few times a day that they can finish quickly, and remove any leftovers from the water's surface to avoid fouling the water.
5Temperature and Seasonal Change
With a lifespan of 2-3 years, White Medaka handle seasonal temperature shifts reasonably well when kept outdoors. That said, sudden temperature changes are stressful, so let replacement water match the tank temperature before a water change.
6Setup to Prepare Beforehand
Before bringing them home, have a tank or tub, some aquatic plants, dechlorinated water, and food ready to go. Acclimating them gradually to the new water before release helps reduce stress from the environment change.
7Easy to Start With
White Medaka is considered beginner-friendly — as long as you keep up with basic water quality care and feeding, they're easy to maintain long-term, making them a popular entry point into medaka keeping.
Frequently asked questions about White Medaka
- Q.Can White Medaka be kept outdoors or indoors?
- A.They can be kept in either setting. Outdoor keeping exposes them to seasonal temperature changes, which some keepers feel brings out better coloring, while indoor keeping makes it easier to maintain a stable environment year-round.
- Q.How long do White Medaka live?
- A.Their typical lifespan is about 2-3 years. Individual results vary depending on day-to-day care, such as water quality management and how well temperature swings are moderated.
- Q.How big does White Medaka grow?
- A.As adults, they typically reach about 2-4cm in length. Their compact size makes them well-suited to small tanks or outdoor tubs.
- Q.Can White Medaka be kept with other medaka colors?
- A.Generally, yes — they can be kept alongside other medaka varieties. However, if you're planning to breed them, it's best to keep colors and lines separate in different containers to avoid mixing.
- Q.Is White Medaka suitable for first-time keepers?
- A.Yes, they're considered beginner-friendly. They're hardy and readily take to prepared food, so with a basic routine of water changes and feeding, they're manageable for someone keeping medaka for the first time.
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Care difficulty, lifespan, size and diet — all basics covered.
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