AI-generated image
Izumo Nankin Goldfish
AdvancedA traditional variety from Izumo, Shimane. No dorsal fin with round body, beautiful when viewed from above.
Difficulty
Advanced
Temperature
5〜30℃（適温18〜24℃）
Lifespan
5-10 years
Size
10-18cm
Diet
Artificial feed, Bloodworms
About
The Izumo Nankin is a rare Japanese goldfish native to the Izumo region of Shimane Prefecture in southwestern Japan, where it has been designated a National Natural Monument. It lacks a dorsal fin and has a rounded, egg-shaped body with a characteristic coloration: a white body with vivid red-orange markings on the belly, head, and around the tail. The symmetrical fan-shaped tail is best appreciated from above, and top-view observation in shallow traditional basins is the time-honored way to enjoy this breed. Historically prized by wealthy families and samurai households in Izumo, the breed is today preserved by dedicated organizations including the Central Nankin Lovers Association. The Izumo Nankin is extremely difficult to source outside Japan and even within Japan remains a specialist breed available primarily through enthusiast clubs and specialist shops.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
southwestern Japan
Lifespan
5-10 years
Size
10-18cm
Temperature
5〜30℃（適温18〜24℃）
Diet
Artificial feed, Bloodworms
Care Guide
Notes
背ビレがない品種
Care Specifications
- pH
- 6–8
- Hardness (GH)
- 5–19 dGH
- Water Temp.
- 18–23℃
PeacefulGroupBreeding: Moderate
Sources: FishBase / Aqueon Goldfish Care Guide
Morphs (Varieties)
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。
Line-bredEstablished by selective line breeding.
Dorsal-lessEgg-shaped bodySarasa (red-and-white)
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.
References & Sources
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.
Taxonomy & Authority
Accepted name: (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.
Izumo Nankin Goldfish Listings
Loading latest listingsFind listings for this species
