---
title: "Oursin rouge géant"
description: "Mesocentrotus franciscanus — Autres animaux. The red sea urchin (Mesocentrotus franciscanus) is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California."
canonical: https://animalchecklist.com/fr/animal/red-sea-urchin
last_updated: 2026-09-20
---

# Oursin rouge géant

> Mesocentrotus franciscanus — Autres animaux. The red sea urchin (Mesocentrotus franciscanus) is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California.

- Scientific name: *Mesocentrotus franciscanus*
- Category: `other` (Autres animaux)
- Habitats: `sea` (Mer et côte)
- iNaturalist observations: 5706
- Wikidata: [Q28912671](https://www.wikidata.org/wiki/Q28912671)
- iNaturalist taxon: [992313](https://www.inaturalist.org/taxa/992313)

## Names

- en: Red Sea Urchin
- es: Erizo rojo de mar
- fr: Oursin rouge géant

## Countries with the most observations

US (3576), CA (1602), MX (47)

## Summary

The red sea urchin (Mesocentrotus franciscanus) is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California. It lives in shallow waters from the low-tide line to greater than 280 m (920 ft) deep, and is typically found on rocky shores sheltered from extreme wave action in areas where kelp is available.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Red_sea_urchin

## Photo

![Oursin rouge géant](https://animalchecklist.com/img/animals/red-sea-urchin/medium.jpg)

Photo: Braden J. Judson · CC0 · inaturalist — https://www.inaturalist.org/observations/37081279

## Machine access

`GET https://animalchecklist.com/api/v1/animals/red-sea-urchin?lang=fr` — see [openapi.json](https://animalchecklist.com/openapi.json).