Wire coral crab (Xenocarcinus tuberculatus) from the Dampier Archipelago, WA (Photo: Clay Bryce)

Wire coral crab

Xenocarcinus tuberculatus

This small mimetic spider crab lives on coral reefs in association with whip corals.

Morphology

Members of this disdinctive genus of spider crabs have an elongated carapace (roughly triangular) with a long rostrum which is generally bifurcate anteriorly. The carapace of X. tuberculatus is smooth with tubercles that resemble the polips from the soft corals. It is white with patterns of orange and brown. No evident sexual dimorphism.

Evolution

The coloration of these crabs resembles their hosts. The genus contains seven species, of which two occur in Australia.

Method of reproduction

Sexual

Habitat

Marine

Associated with gorgonians, black corals and hydroids.

Distribution

Indo-West Pacific

Taxonomy

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Subclass: Eumalacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Brachyura
Superfamily: Majoidea
Family: Epialtidae
Genus: Xenocarcinus
Species: tuberculatus
Name Published Year: 1847
Scientific Name Authorship: White
Commercial Impact: 

None

Conservation Assessment: Data Deficient

Net Conservation Benefits Fund

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Western Australian Museum Collections https://museum.wa.gov.au/online-collections/names/Xenocarcinus-tuberculatus
Accessed 6 Jun 2025

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