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Ocean animals

Great seahorse

Amazing fact

In Hippocampus kelloggi, the male carries eggs in a pouch under his tail.

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Great seahorse in its habitat (illustration)

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An illustration based on the real animal.

A little discovery to share.

It has a thick, long snout.

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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
Facts about the real animal.

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.

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01

It lives from the Pacific coast of southern Japan, the Izu Islands and the Ryukyu Islands across the Indian and Pacific Oceans.

02

It has a thick, long snout.

03

It lives on rocky reefs near the coast.

How the Great seahorse lives

It lives in deep water in places with corals.

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Basic data

Size
Total length: up to about 20 cm
Range
Pacific coast of southern Japan, Izu Islands, Ryukyu Islands, Indian Ocean, and Pacific Ocean
鳥羽水族館

Where the Great seahorse has been recorded

World map with dots where the Great seahorse has been recorded
Each dot marks a place with observations or specimens shared on GBIF. Some records are of animals that strayed or were brought by people, so the dots are not always where the animal lives.

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

简体中文
克氏海马
繁體中文
克氏海馬
한국어
진잘해마
Português (Brasil)
Cavalo-marinho-de-Kellogg
Bahasa Indonesia
Kuda laut kellogg

Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.

Sources and how we check

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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