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Carassius auratus var.
Cross between Jikin and Butterfly Tail. Tail spreads like butterfly wings from above, combined with Jikin's 'six-scale' pattern. Extremely rare.
The Butterfly Jikin is a cross combining the Jikin lineage—a traditional Japanese variety also recognized as a natural treasure in Aichi Prefecture—with a butterfly-style tail that spreads like a butterfly when viewed from above. The Jikin is prized for its X-shaped (peacock) tail and a distinctive red-and-white pattern called "rokurin," in which red is confined to the lips, fins, and tail; adding the elegance of a butterfly tail produces a highly individual fish. It is extremely rare in the trade, and because shaping its body, tail, and coloration takes effort, it is regarded as a variety for advanced keepers. Keep it in a tank of 60 liters or more with clean water, arrange the layout to avoid damaging the fins, and care for it carefully with appropriate feeding and regular water changes.
Origin
Japan
Lifespan
10-15 years
Size
15-20cm
Temperature
15〜28℃
Goldfish pellets, bloodworms, daphnia
Shallow top-view tank or pond recommended
Specimens with both six-scale and butterfly tail are extremely rare
Sources: FishBase / Aqueon Goldfish Care Guide
金魚品種は体型・尾型・鱗・色の選抜固定(line-bred)。出目・透明鱗(キャリコ)・白子等は単一座。
Sources: Wikipedia - Goldfish (Varieties) / 金魚 - Wikipedia (日本語版・品種)
A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Carassius auratus var. (Linnaeus, 1758)
Synonyms: Cyprinus auratus Linnaeus, 1758, Carassius auratus auratus (Linnaeus, 1758), Cyprinus thoracatus Valenciennes, 1842, Carassius burgeri Temminck & Schlegel, 1846, Cyprinus chinensis Gronow, 1854
Authority databases: FishBase · GBIF · FishBase: Carassius auratus · GBIF: Carassius auratus
Nomenclature follows global taxonomic authority databases.
Find listings for this species
Provide gentle environment to protect butterfly tail
Hard to obtain. Purchase directly from specialist breeders
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Butterfly Jikin is 15〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Butterfly Jikin is 10-15 years. With proper care and nutrition, they can live a long and healthy life.
Butterfly Jikin typically reaches 15-20cm as an adult. Size may vary depending on care conditions and individual genetics.
Butterfly Jikin feeds on: Goldfish pellets, bloodworms, daphnia. Aim for a balanced diet with appropriate feeding frequency.
The price of Butterfly Jikin varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026