
Photo: Totti / CC BY-SA 4.0 / Wikimedia Commons
National Natural Monument
Fish
Tetsugyo (iron fish)
Carassius auratus
The tetsugyo ("iron fish") is an unusual form of crucian carp, named for its dark, iron-like color and notable for its long, flowing fins. Its origin is still debated. The habitat at Yutorinuma Pond in Kami, Miyagi, is a national Natural Monument, while habitats at Wakahata Pond in Obanazawa, Yamagata, and at Honenji Temple in Owase, Mie, are prefectural Natural Monuments.
- Scientific name
- Carassius auratus
- Group
- Fish
- Prefectures
- Miyagi, Yamagata, Mie
- 日本語
- テツギョ
- 简体中文
- 铁鱼
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Frequently asked questions
The Tetsugyo (iron fish) is designated as a species without a fixed area and lives in places such as Miyagi, Yamagata, Mie.
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