Koiニシキゴイ
Cyprinus carpioNE— Not Evaluated
Koi are ornamental color varieties of the Amur carp, developed through selective breeding that began in the early 19th century in the Nijūmuragō region of what is now Niigata Prefecture, Japan. Long-lived and highly social bottom-feeders, they are prized worldwide for their vivid patterns and can live for decades, with some pond-raised individuals reportedly reaching a century or more. Elite show-quality koi command extraordinary prices at auction, reflecting the fish's deep cultural significance in Japan as a symbol of luck and perseverance.
Koi (reference photo)
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Species Data
- Classification
- Cypriniformes / Cyprinidae Source
- Distribution
- An ornamental variety bred from wild carp, koi originated in the early 19th century in the "Nijūmuragō" area spanning present-day Ojiya and the Yamakoshi region of Nagaoka in Niigata Prefecture, and are now kept and exported worldwide. Source
Did You Know?
- Koi have a well-known tendency to grow in proportion to the size of their environment, so the same individual might stay around 15 cm in a small tank but reach roughly 80 cm in a spacious pond. Source
- A koi named Hanako became famous after a 1974 scale-ring analysis reportedly put her age at 226 years, but the method is now considered to have miscounted growth rings, and the claim is no longer accepted. Source
- Koi are also known for fetching extraordinary prices; in 2018 a single fish sold to a Chinese collector for about $2 million, setting a record at the time. Source
Where to See This Species
3 facilities · 0 individuals
さいたま水族館 (Saitama Suizokukan)Saitama東武伊勢崎線羽生駅または加須駅からタクシーで約15分（約7km）。
さいたま水族館のWikipedia記事に飼育種として記載 Source
ふくしま海洋科学館 (Fukushimakaiyoukagakukan)FukushimaOpened in 2000
ふくしま海洋科学館のWikipedia記事に飼育種として記載 Source
桐生が岡動物園 (Kiryuugaoka Doubutsuen)Gunma自動車の場合、カーナビ検索は「桐生が岡動物園」ではなく「桐生が岡遊園地」で設定すると駐車場に到着できる（動物園名で検索すると誤った経路になる場合がある）。
桐生が岡動物園のWikipedia記事に飼育種として記載 Source
Conservation Story
Conservation Status
観賞用に改良された飼育品種であり、IUCNレッドリストの評価対象外である。
Habitat
コイをもとに日本で改良された観賞魚で、池や水路でも飼育される。
Threats
- 飼育品種のためIUCN評価の対象外。野外放流による生態系への影響
Conservation & Breeding Efforts
- 適正飼育と野外放流を避けるための啓発
- 動物園や水族館では日本の淡水魚・庭園文化を伝える展示で親しまれ、品種ごとの色彩を見比べられる。
Sources
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FAQ
- Where do koi come from?
- Koi were developed from wild Amur carp through selective breeding that began in the early 1820s in the Nijūmuragō area, spanning present-day Ojiya City and the Yamakoshi district of Nagaoka in Niigata Prefecture, Japan. Source
- How long do koi live?
- Koi commonly live several decades in good conditions, and some pond-raised individuals are reported to have lived over a century; a famous claim that one koi named Hanako reached 226 years is now considered a miscount of scale growth rings rather than an accurate age. Source
- Why do some koi grow much larger than others?
- Koi growth is strongly shaped by their environment—individuals kept in small tanks tend to stay small, while the same fish raised in a spacious pond can grow to around 70-80 cm or more, since their growth rate adjusts to available space. Source
Source: ja.wikipedia.org en.wikipedia.org