How difficult is it to keep Marine Blue Medaka?

Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.

What is the ideal temperature for Marine Blue Medaka?

The ideal temperature for Marine Blue Medaka is 18〜24℃. Avoid sudden temperature changes and maintain a stable environment.

What is the lifespan of Marine Blue Medaka?

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

How large does Marine Blue Medaka get?

Marine Blue Medaka typically reaches 3-4cm as an adult. Size may vary depending on care conditions and individual genetics.

What should I feed Marine Blue Medaka?

Marine Blue Medaka feeds on: Medaka pellets. Aim for a balanced diet with appropriate feeding frequency.

What is the typical price for Marine Blue Medaka?

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

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Marine Blue Medaka

Beginner

Deep blue body color reminiscent of the sea. Representative blue medaka variety derived from Miyuki lineage.

Difficulty

Beginner

Temperature

5〜30℃

Lifespan

2-3 years

Size

3-4cm

Diet

Medaka pellets

About

Marine Blue medaka is a representative blue medaka variety derived from Miyuki lineage, whose deep blue body color evokes the open sea. The indigo-to-deep-blue coloration shifts in expression depending on viewing angle and light, creating a cool and elegant beauty. White containers or bright backgrounds best bring out the blue, though the variety also holds strong presence in dark containers. Compatible with green water (phytoplankton-rich) and outdoor biotope setups. Selective breeding of deeply blue individuals produces more intensely colored offspring.

Lifespan of the Marine Blue Medaka

The Marine Blue Medaka lives 2-3 years.

Size of the Marine Blue Medaka

The Marine Blue Medaka grows to 3-4cm.

Temperature & humidity for the Marine Blue Medaka

The ideal water temperature for the Marine Blue Medaka is 18〜24℃.

Hardy in 5–30°C, neutral to slightly alkaline water.

Basic Info

Origin

Japan (selectively bred variety)

Lifespan

2-3 years

Size

3-4cm

Temperature

5〜30℃

Care Specifications

pH: 7–8
Hardness (GH): 9–19 dGH
Water Temp.: 18–24℃

PeacefulGroupBreeding: Easy

Sources: FishBase: Oryzias latipes / Seriously Fish: Oryzias latipes

Morphs (Varieties)

Selectively bred killifish are trait combinations of body form × body color × pattern × luminescence (internal/external) × scale types (transparent scales) × sparkle × fin morphology and so forth. Published entries include only confirmed traits constituting the given variety, with genetic inheritance patterns provided only for confirmed traits (uncertain cases omitted). Genetic patterns are provided as reference for breeding.

PolygenicContinuous trait from multiple genes; intensified by selective breeding.

Body luster (taikougai)

Other

Blue body

Sources: JMA Japan Medaka Association — Improved Medaka Variety Classification Manual (JA) / Improved Medaka Web Encyclopedia (medakazukan, JA)

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

References & Sources

Edited & verified by: BreederDirect editorial team

The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.

Primary sources

Taxonomy & Authority

Accepted name: (Temminck & Schlegel, 1846)

Synonyms: Aplocheilus latipes (Temminck & Schlegel, 1846), Poecilia latipes Temminck & Schlegel, 1846, Oryzias latipes latipes (Temminck & Schlegel, 1846)

Authority databases: FishBase · GBIF · Japan Medaka Association — Variety Classification Manual (JA)

Nomenclature follows global taxonomic authority databases.