Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Marsh Fidler Crab

Uca pugnax


Dark coloration, with creamy, almost yellow large claw on males used for fighting and attracting females. Females have no large claw.


Salt marshes, and reed beds.


Studying the Barnagat Bay with The Sedge Island Summer group of 2010.

Species ID Suggestions

Sign in to suggest organism ID


Scott Frazier
Scott Frazier 9 years ago

Moved to Arthropods :-)

ulvalactuca77 9 years ago

Ha, fighting...

alexmdevoy 9 years ago

Thanks! I tried to get a shot a male and female on my hand to show the difference, but they are just so fast, and it kept running off my hand! Im 14 and at the time i was just turning 13, but i was in a biology program in the Barnagat Bay, in NJ. I saw a lot interesting things there...check out the baby turtle on my page. I just started project noah as few weeks ago, so now i have to go through like 10,000 pics i took over the years of the animals. So, im going to have a lot of spotting that i spotted from a few years ago.

KarenL 9 years ago

Nice shot! Interesting to see the difference in size between the claws.

Spotted by

Long Beach Township, New Jersey, USA

Spotted on Aug 9, 2010
Submitted on Nov 13, 2011

Noah Guardians
Noah Sponsors

Join the Project Noah Team Join Project Noah Team