---
title: "Rockweed isopod"
description: "Pentidotea wosnesenskii — Autres animaux. Pentidotea wosnesenskii is a marine isopod which lives on seaweed on rocky shores along the British Columbia and Washington coastlines, as far south as San Francisco."
canonical: https://animalchecklist.com/fr/animal/rockweed-isopod
last_updated: 2026-09-20
---

# Rockweed isopod

> Pentidotea wosnesenskii — Autres animaux. Pentidotea wosnesenskii is a marine isopod which lives on seaweed on rocky shores along the British Columbia and Washington coastlines, as far south as San Francisco.

- Scientific name: *Pentidotea wosnesenskii*
- Category: `other` (Autres animaux)
- Habitats: `sea` (Mer et côte)
- iNaturalist observations: 4878
- Wikidata: [Q3010265](https://www.wikidata.org/wiki/Q3010265)
- iNaturalist taxon: [126295](https://www.inaturalist.org/taxa/126295)

## Names

- en: Rockweed isopod

## Countries with the most observations

US (2832), CA (1878)

## Summary

Pentidotea wosnesenskii is a marine isopod which lives on seaweed on rocky shores along the British Columbia and Washington coastlines, as far south as San Francisco. It can often be found hiding under rockweed (Fucus distichus) in the intertidal zone, and can be found at depths up to 919 metres (3,015 ft). It was described as Idotea wosnesenskii in 1851, by Johann Friedrich von Brandt, and is named after the Russian biologist Ilya G. Voznesensky. The isopod grows up to 4 centimetres (1.6 in) in length and is usually green in colour.
It is preyed upon by the surf scoter.

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

## Photo

![Rockweed isopod](https://animalchecklist.com/img/animals/rockweed-isopod/medium.jpg)

Photo: Allison McCabe · CC0 · inaturalist — https://www.inaturalist.org/observations/123296607

## Machine access

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