The fiddler crab or calling crab is any of about a hundred species of semiterrestrial marine crabs in the family Ocypodidae, well known for their extreme sexual dimorphism: male crabs carry one major claw significantly larger than their minor claw, while females' claws are both the same size, and the name fiddler crab comes from the resemblance of the small and large claw together to a fiddle. Fiddler crabs are found along sea beaches and brackish intertidal mud flats, lagoons, swamps and other brackish or salt-water wetlands, and if a major claw is lost, a male will regenerate one on the same side after its next molt.
Facts
Classification
System (Realm) System (Realm) Relationship to People Living or Extinct Identification
Distinguishing AppearanceMales have a major claw much larger than the minor claw, while both female claws are the same size 1 Scientific Name Connections
Child Taxon Of
Source Wikidata: Fiddler Crab
In Biome
Source Fiddler crab - Wikipedia
Source Fiddler crab - Wikipedia
In the Other Atlases
Found In
Also in Geography Atlas: where this subject is found.
Also in Geography Atlas: where this subject is found.
Sources
1. Fiddler crab - Wikipedia
Appearance
These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly larger than their minor claw, whilst females' claws are both the same size.
article text (diet), EntityId 295444
Whilst the fiddler crab is classified as an omnivore, it does present itself as an opportunist and will consume anything with nutritional value.
article text (relationship to people), EntityId 295444
Fiddler crabs are occasionally kept as pets.
In Biome: Intertidal Zone, Lead
Fiddler crabs are found along sea beaches and brackish intertidal mud flats, lagoons, swamps, and various other types of brackish or salt-water wetlands.
In Biome: Wetlands, Lead
Fiddler crabs are found along sea beaches and brackish intertidal mud flats, lagoons, swamps, and various other types of brackish or salt-water wetlands.
View the Source2. GBIF Species API
3. Wikidata (taxon extant/extinct status)
Wikimedia Foundation / Wikidata contributorsQ1329937, descriptionView the Source 4. GBIF Backbone Taxonomy: Uca
GBIF Backbone TaxonomyTaxon recordQuote, Taxon record
"canonicalName": "Uca"
Wikidata: Fiddler Crab
- Wikidata Q1329937, class allow-list match (w-wdresolver-0926)
- Child Taxon Of: Ghost Crab, Wikidata P171 (parent taxon) claim, rank=normal, target=Q932818 (Ghost Crab)
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