Species · GBIF taxon 9607299
Austruca perplexa
austruca perplexaAlso known as Perplexing Fiddler Crab, Perplexed Fiddler Crab
Perplexing fiddler crabs are highly social, burrow-dwelling crustaceans that populate tropical and subtropical mudflats. Males possess a single, enormously enlarged major claw used in rhythmic waving displays to attract mates and defend territory against rivals. As the tide recedes, these active crabs emerge in vast numbers to feed on organic detritus, retreating rapidly to their burrows at the slightest sign of danger.
CrustaceanIntertidalSocial
- diet
- Microscopic algae, bacteria, and organic detritus filtered from the sand
- family
- Ocypodidae
- threats
- Coastal development, habitat destruction, and water pollution
- life Span
- 1 to 3 years
NE
Males can deliver a minor pinch with their large claw; observe them from a distance.
- Approach slowly: Walk softly on mudflats as they are highly sensitive to ground vibrations and shadows.
- Watch the wave: Use binoculars to observe the distinct waving patterns males use to signal females.
- Respect the burrows: Avoid stepping on the small, round burrow entrances during low tide.