---
title: "Portly Spider Crab"
description: "Libinia emarginata — Other animals. Libinia emarginata, the portly spider crab, common spider crab or nine-spined spider crab, is a species of stenohaline crab that lives on the Atlantic coast of North America."
canonical: https://animalchecklist.com/animal/portly-spider-crab
last_updated: 2026-09-20
---

# Portly Spider Crab

> Libinia emarginata — Other animals. Libinia emarginata, the portly spider crab, common spider crab or nine-spined spider crab, is a species of stenohaline crab that lives on the Atlantic coast of North America.

- Scientific name: *Libinia emarginata*
- Category: `other` (Other animals)
- Habitats: `sea` (Sea & coast)
- iNaturalist observations: 4949
- Wikidata: [Q5234006](https://www.wikidata.org/wiki/Q5234006)
- iNaturalist taxon: [53740](https://www.inaturalist.org/taxa/53740)

## Names

- en: Portly Spider Crab
- fr: Crabe araignée à neuf épines

## Countries with the most observations

US (2346), CA (28), MX (6)

## Summary

Libinia emarginata, the portly spider crab, common spider crab or nine-spined spider crab, is a species of stenohaline crab that lives on the Atlantic coast of North America.

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

## Photo

![Portly Spider Crab](https://animalchecklist.com/img/animals/portly-spider-crab/medium.jpg)

Photo: Mike Mulqueen · CC0 · inaturalist — https://www.inaturalist.org/observations/8300922

## Machine access

`GET https://animalchecklist.com/api/v1/animals/portly-spider-crab?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).