Fauna
Invertebrate

Mexican Fiddler Crab

Leptuca crenulata

Mexican Fiddler Crab males carry one enlarged claw used for visual courtship and territorial signals. Colonies emerge across exposed mud or sand to sift microscopic food from the surface.

Intertidal CrabWaving DisplayBurrow Dweller
Mexican Fiddler Crab reference
(c) James M. Maley, some rights reserved (CC BY) · cc-by
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyAlgae, microbes, and organic particles sifted from sediment
Predators
  • Shorebirds
  • Fish
  • Larger crabs
ThreatsShoreline development, trampling, polluted runoff, and altered tidal flow
HabitatsSheltered mudflats, salt-marsh edges, lagoons, and estuarine shores
Life spanUsually about 1 to 3 years
Classification
  1. FamilyOcypodidae
  2. SpeciesLeptuca crenulata
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Stay on firm access routes and avoid collapsing occupied burrows.
Responsible observation
  • Tide: Watch as receding water exposes the colony's feeding ground.
  • Display: Remain still to see males wave their enlarged claws.
Related species

Related species have not been added yet.

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