How difficult is it to keep Momo Medaka?

Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.

What is the ideal temperature for Momo Medaka?

The ideal temperature for Momo Medaka is 18〜28℃. Avoid sudden temperature changes and maintain a stable environment.

What is the lifespan of Momo Medaka?

The average lifespan of Momo Medaka is 2-3 years. With proper care and nutrition, they can live a long and healthy life.

How large does Momo Medaka get?

Momo Medaka typically reaches Up to about 4cm SL as an adult. Size may vary depending on care conditions and individual genetics.

What should I feed Momo Medaka?

Momo Medaka feeds on: Prepared medaka food, green water. Aim for a balanced diet with appropriate feeding frequency.

What is the typical price for Momo Medaka?

The price of Momo Medaka varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.

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Momo Medaka

Intermediate

Oryzias latipes

An improved medaka with the narrow-fin trait, in which the anal fin is only half the usual width. Announced in 2022 by Takayasu Ohba and certified as the 37th new variety by the Japan Medaka Association.

Difficulty

Intermediate

Temperature

18〜28℃

Lifespan

2-3 years

Size

Up to about 4cm SL

Diet

Prepared medaka food, green water

About

Momo was announced in 2022 by Takayasu Ohba and is the 37th variety certified as new by the Japan Medaka Association. The association's list gives its classification name as the white-and-vermilion glitter blotched hirenaga medaka, and the fin trait recognised through this variety was later named narrow fin. Narrow fin is defined by a short anal fin only half the usual width; the rays are not fewer but packed more densely, which rounds the fin and gives what the classification manual calls a delicate impression. The manual notes that the trait brings none of the usual drawbacks of fin mutations, such as reduced egg yield or difficulty sexing the fish, and that its fixation rate exceeds 70 percent. The variety combines a two-tone white and vermilion pattern with glitter and blotching plus hirenaga fins, and narrow fin, like wide fin, is among the more recently codified traits.

Source: Wikipedia (CC BY-SA 4.0)

Lifespan of the Momo Medaka

The Momo Medaka lives 2-3 years.

Size of the Momo Medaka

The Momo Medaka grows to Up to about 4cm SL.

Temperature & humidity for the Momo Medaka

The ideal temperature for the Momo Medaka is 18〜28℃.

Basic Info

Origin

Japan (domestic variety announced in 2022 by Takayasu Ohba)

Lifespan

2-3 years

Care Specifications

pH: 7–8
Hardness (GH): 9–19 dGH
Water Temp.: 18–28℃

PeacefulGroupBreeding: Moderate

Sources: Medaka Web Encyclopedia: Complete Medaka Care Guide / FishBase Oryzias latipes / Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: JMA Certified New Varieties List

Morphs (Varieties)

The Japan Medaka Association's classification manual sorts varieties by traits that can be seen rather than by genotype, and does not set out how individual traits are inherited. Traits the manual explicitly says can be passed on and produced by selective, multi-generation breeding are listed as line-bred; the rest are grouped under Other.

Line-bredEstablished by selective line breeding.

Buchi (black blotching)

Other

White-and-vermilion body colourLame (glitter scales)Hirenaga (all-fin elongation)Narrow fin

Sources: Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: Medaka Traits / Medaka Web Encyclopedia: JMA Certified New Varieties List

A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.