---
title: "Squareback Marsh Crab"
description: "Armases cinereum — Altri animali. Armases cinereum, also known as the squareback marsh crab or wharf crab, is a species of crab in the family Sesarmidae."
canonical: https://animalchecklist.com/it/animal/squareback-marsh-crab
last_updated: 2026-09-20
---

# Squareback Marsh Crab

> Armases cinereum — Altri animali. Armases cinereum, also known as the squareback marsh crab or wharf crab, is a species of crab in the family Sesarmidae.

- Scientific name: *Armases cinereum*
- Category: `other` (Altri animali)
- Habitats: `freshwater` (Laghi e fiumi), `sea` (Mare e costa)
- iNaturalist observations: 5937
- Wikidata: [Q6497777](https://www.wikidata.org/wiki/Q6497777)
- iNaturalist taxon: [122246](https://www.inaturalist.org/taxa/122246)

## Names

- en: Squareback Marsh Crab
- es: Cangrejo de muelle

## Countries with the most observations

US (4159), MX (7)

## Summary

Armases cinereum, also known as the squareback marsh crab or wharf crab, is a species of crab in the family Sesarmidae. The wharf crab is a small crab that is dark brown to muddy in color, which allows it to blend in with its usual surroundings. It is found on the Atlantic southeastern coast, down into the Gulf of Mexico. It is an omnivore and is prevalent in marshy coastal environments along the Southwestern Atlantic.

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

## Photo

![Squareback Marsh Crab](https://animalchecklist.com/img/animals/squareback-marsh-crab/medium.jpg)

Photo: John Fones · CC0 · inaturalist — https://www.inaturalist.org/taxa/122246

## Machine access

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