Great seahorse

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An illustration based on the real animal.
A little discovery to share.
It has a thick, long snout.
THE REAL WORLD
The real Great seahorse
- Scientific name
- Hippocampus kelloggi
- Japanese name
- オオウミウマ
- Group
- Ocean animals
- Order
- Syngnathiformes
- Family
- Syngnathidae
- Genus
- Hippocampus
Where the name “Great seahorse” comes from
The genus name Hippocampus comes from the Greek words for horse and curvature. The scientific name kelloggi honors Kellogg, a researcher who studied insects.
FishBaseIt lives from the Pacific coast of southern Japan, the Izu Islands and the Ryukyu Islands across the Indian and Pacific Oceans.
How the Great seahorse lives
It lives in deep water in places with corals.
FishBaseBasic data
- Size
- Total length: up to about 20 cm
- Range
- Pacific coast of southern Japan, Izu Islands, Ryukyu Islands, Indian Ocean, and Pacific Ocean
Where the Great seahorse has been recorded

Records: GBIF.org (CC0 and CC BY 4.0 records, retrieved 2026-11-07). Map: Natural EarthSee the records on GBIF
Watch wild animals from a distance. Do not touch or feed them, and take care of the places where they live.
Names around the world
- 日本語
- オオウミウマ
- 简体中文
- 克氏海马
- 繁體中文
- 克氏海馬
- 한국어
- 진잘해마
- Español
- Caballito de Mar Mayor
- Português (Brasil)
- Cavalo-marinho-de-Kellogg
- Italiano
- Cavalluccio di Kellogg
- العربية
- فرس البحر الكبير
- Bahasa Indonesia
- Kuda laut kellogg
- Tiếng Việt
- Cá ngựa thân trắng
- ไทย
- ม้าน้ำยักษ์
Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.
Sources and how we check
- 鳥羽水族館 — オオウミウマChecked: 2026-11-04
- FishBase — Hippocampus kelloggi, Great seahorseChecked: 2026-11-09
We check each fact against its source. The illustrations simplify how the real animal looks.
The classification (class, order, family, genus) follows Wikidata records, checked against GBIF. Classifications can change as research goes on.
The basic data are the values given in each source. They vary with how the animal is measured, whether it is male or female, and whether it lives in the wild or in captivity.
This page was translated from the original Japanese with the help of AI.
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