Hariyo (Japanese freshwater three-spined stickleback)
Gasterosteus aculeatus subsp. 2
Photo: Alpsdake / CC BY-SA 3.0 / Wikimedia Commons
The Hariyo is a small stickleback living in spring-fed waters in places such as Gifu Prefecture. It carries sharp spines on its back, and in spring the male builds a nest of water plants to guard the eggs. It depends on cool, clean spring water, and its habitats and breeding sites are protected in several places.
- Scientific name
- Gasterosteus aculeatus subsp. 2
- Group
- Fish
- Prefectures
- Gifu
- Japanese Red List (Ministry of the Environment)
- Critically EndangeredMinistry of the Environment Red List 2020
- 日本語
- ハリヨ
- 简体中文
- 日本淡水三刺鱼（Hariyo）
Sign in to record the animals you meet in your private journal and to post photos and comments. Browsing needs no account.
Sign inNatural Monuments related to the Hariyo (Japanese freshwater three-spined stickleback)
Where to see the Hariyo (Japanese freshwater three-spined stickleback)
Facilities whose official websites show this animal on display. Exhibits can change, so check each facility's latest information before you go.
Map
Markers show designated habitats and breeding sites.
Loading map…
Frequently asked questions
The Hariyo (Japanese freshwater three-spined stickleback) is designated as a species without a fixed area and lives in places such as Gifu.
You can see the Hariyo (Japanese freshwater three-spined stickleback) at Aqua Totto Gifu, Lake Biwa Museum, among others (confirmed on each facility's official website on 2026-10-15).
The Hariyo (Japanese freshwater three-spined stickleback) is listed as "Critically Endangered" in the Ministry of the Environment Red List 2020 (listed as ハリヨ).
Animals related to the Hariyo (Japanese freshwater three-spined stickleback)
Animals in the same group or designated in the same area.
Community photos
Sign in to post and share photos and comments about the animals you meet.
Comments
No comments yet.