How difficult is it to keep Bronze Medaka?

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

What is the ideal temperature for Bronze Medaka?

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

What is the lifespan of Bronze Medaka?

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

How large does Bronze Medaka get?

Bronze 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 Bronze Medaka?

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

What is the typical price for Bronze Medaka?

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

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Bronze Medaka

Intermediate

Oryzias latipes

An improved medaka whose amber-tinged dark body carries a bronze external sheen. Created in 2019 by Masaharu Tarumi as a derivative of Rinkou, part of the bloodline known as rinkou.

Difficulty

Intermediate

Temperature

18〜28℃

Lifespan

2-3 years

Size

Up to about 4cm SL

Diet

Prepared medaka food, green water

About

Bronze was created in 2019 by Masaharu Tarumi; its classification name is the black-amber semi-transparent-scale external-luminescence medaka, with the sub-trait rinkou, a form of external luminescence, and the common note isshukou, luminescence that runs right around the body. The Medaka Web Encyclopedia registers it as type No.0208 and variety No.0193. The same source documents its origin in detail: around 2016 Tarumi crossed his Kizakura with Yume Lame, which began the development of both Bronze and Rinkou. An albino hikari body type was crossed in along the way, and when unusual external luminescence was noticed among the offspring the line was named rinkou and bred on through the generations. Bronze is the line within it selected for bronze colouring; fin luminescence is not yet as strong as in Rinkou, and further development is stated as the intention.

Source: Wikipedia (CC BY-SA 4.0)

Lifespan of the Bronze Medaka

The Bronze Medaka lives 2-3 years.

Size of the Bronze Medaka

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

Temperature & humidity for the Bronze Medaka

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

Basic Info

Origin

Japan (domestic variety created in 2019 by Masaharu Tarumi)

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 / Medaka Web Encyclopedia No.0208

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.

Wrap-around luminescence (isshukou)

Other

Black-amber body colourSemi-transparent scale (aurora)External luminescence, rinkou type

Sources: Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: Medaka Traits / Medaka Web Encyclopedia No.0208

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