Ikimono KokuhoLiving Treasures of Japan
Tri-spine Horseshoe Crab

Photo: Daiju Azuma / CC BY-SA 2.5 / Wikimedia Commons

National Natural Monument
Other invertebrates

Tri-spine Horseshoe Crab

Tachypleus tridentatus

A marine arthropod with a hard shell and sword-like tail, called a living fossil because its form has changed little since ancient times. It spawns on tidal flats along the Seto Inland Sea and in northern Kyushu. Land reclamation has reduced its habitat, and breeding sites in Kasaoka, Okayama, and Imari, Saga, are national Natural Monuments, while one in Saijo, Ehime, is a prefectural Natural Monument.

Scientific name
Tachypleus tridentatus
Group
Other invertebrates
Prefectures
Okayama, Ehime, Saga
日本語
カブトガニ
简体中文
中国鲎

Sign in to record the animals you meet

Sign in

Natural Monuments related to the Tri-spine Horseshoe Crab

Map

Markers show designated habitats and breeding sites.

Frequently asked questions

The Tri-spine Horseshoe Crab (Tachypleus tridentatus) is protected as a Natural Monument of Japan (3 designations). A marine arthropod with a hard…

The Tri-spine Horseshoe Crab is designated as a species without a fixed area and lives in places such as Okayama, Ehime, Saga.

Community photos

Sign in to post and share photos and comments about the animals you meet.

Comments

Share

XLINEFacebook