How difficult is it to keep Clear Brown Medaka?

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

What is the ideal temperature for Clear Brown Medaka?

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

What is the lifespan of Clear Brown Medaka?

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

How large does Clear Brown Medaka get?

Clear Brown 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 Clear Brown Medaka?

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

What is the typical price for Clear Brown Medaka?

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

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Clear Brown Medaka

Intermediate

Oryzias latipes

An improved medaka of the hikari body type combining yellow body colour with semi-transparent scales and a black rim. Its translucent amber tone, produced by the aurora genes, is the defining feature, and it became the basis for many black-rim lines.

Difficulty

Intermediate

Temperature

18〜28℃

Lifespan

2-3 years

Size

Up to about 4cm SL

Diet

Prepared medaka food, green water

About

Clear brown is the nickname for a hikari-type medaka with yellow body colour, semi-transparent scales and a black rim, classified as the yellow semi-transparent-scale black-rim hikari medaka. The Medaka Web Encyclopedia registers it as type No.0228, and it also circulates as yellow aurora black-rim hikari. It was created in 2010 by Yoshihiro Ninomiya. Semi-transparent scale is the trait also known as aurora, and the translucent amber tone its genes produce is regarded as one of the variety's attractions. Clear brown also became the basis for many black-rim lines: otohime, an orange fish with semi-transparent scales and a black rim, was bred by crossing clear brown with beni, the youkihi transparent-scale hikari. Fish without the black rim, and fish of the standard body type, are sometimes called clear brown as well. The breeder's own description notes that white, yellow and aurora fish appear among the offspring, and that the colour shows more clearly when the fish are kept in a dark container; it was the first of the aurora lines to be offered for sale.

Source: Wikipedia (CC BY-SA 4.0)

Lifespan of the Clear Brown Medaka

The Clear Brown Medaka lives 2-3 years.

Size of the Clear Brown Medaka

The Clear Brown Medaka grows to Up to about 4cm SL.

Temperature & humidity for the Clear Brown Medaka

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

Basic Info

Origin

Japan (a domestic variety created in 2010 by Yoshihiro Ninomiya)

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.0228 (Clear brown)

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.

Other

Yellow body colourSemi-transparent scale (aurora)Black rimHikari body type

Sources: Japan Medaka Association: Variety Classification Manual, 5th ed. (Sep 2025) / Medaka Web Encyclopedia: Medaka Traits / Medaka Web Encyclopedia No.0228 (Clear brown)

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