How difficult is it to keep Matsui Hirenaga Medaka?

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

What is the ideal temperature for Matsui Hirenaga Medaka?

The ideal temperature for Matsui Hirenaga Medaka is 5〜30℃. Avoid sudden temperature changes and maintain a stable environment.

What is the lifespan of Matsui Hirenaga Medaka?

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

How large does Matsui Hirenaga Medaka get?

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

What should I feed Matsui Hirenaga Medaka?

Matsui Hirenaga Medaka feeds on: Medaka pellets, daphnia. Aim for a balanced diet with appropriate feeding frequency.

What is the typical price for Matsui Hirenaga Medaka?

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

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Matsui Hirenaga Medaka

Intermediate

Oryzias latipes var.

Medaka with elongated dorsal, caudal, and pectoral fins. Developed by Matsui fish farm. Gracefully flowing fins are best appreciated from the side.

Difficulty

Intermediate

Temperature

5〜30℃

Lifespan

2-3 years

Size

3-4cm

Diet

Medaka pellets, daphnia

About

Matsui Hirenaga medaka is a long-finned improved variety developed by Matsui Fish Farm in Okayama Prefecture, with all fins — dorsal, caudal, pectoral, and ventral — elongated beyond normal. Unlike the swallow-tail trait, all fins are uniformly extended, creating gracefully flowing fin movement best appreciated in side-view aquariums. Long-fin trait is highly heritable. Strong water flow is the primary care concern — it damages delicate fins and increases bacterial fin rot risk; sponge filters providing gentle current are essential. Hardy in 5–30°C, neutral to slightly alkaline water. Exists in many combinations including Miyuki Hirenaga and Youkihi Hirenaga.

Lifespan of the Matsui Hirenaga Medaka

The Matsui Hirenaga Medaka lives 2-3 years.

Size of the Matsui Hirenaga Medaka

The Matsui Hirenaga Medaka grows to 3-4cm.

Basic Info

Origin

Japan (selectively bred variety)

Lifespan

2-3 years

Size

3-4cm

Temperature

5〜30℃

Diet

Medaka pellets, daphnia

Care Guide

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.

RecessiveVisual only with two copies; one copy = het (carrier).

Matsui fin-length

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: Oryzias latipes var. (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.