Atlantic Marsh Fiddler (Uca pugnax)

Atlantic marsh fiddler

Like all male fiddler crabs, the left claw of a male Atlantic marsh fiddler (Uca pugnax) is much larger than the right claw.

The Atlantic marsh fiddler, also known as a mud fiddler, is common in South Carolina estuaries (where rivers meet the sea). This crustacean thrives in marsh habitats where the substrate is stable enough to allow for the construction of burrows. The Atlantic marsh fiddler is often found foraging for food in large groups along creek banks during low tide. It feeds primarily on algae and decaying plant and animal material, called detritus, and is eaten by various fish, birds, and other crabs.