A porcelain crab (Pachycheles sculptus) collected from the Montebello Islands (Photo: Andrew Hosie).

Sculptured porcelain crab

Pachycheles sculptus

The sculptured porcelain crab is a common reef inhabitant in tropical Western Australia, but is not often seen as it is usually well hidden, often inside sponges. The red and white colouring of this species is diagnostic.

Morphology

Carapace subcircular, without sculpturing. Claws inflated and with large faceted tubercles.

Evolution

The porcelain crabs are not true crabs, but are the result of an independent but convergent evolutionary lineage more closely related to hermit crabs.

Habitat

Marine

Shallow water, <30 m. found in reef habitats often associated with sponges.

Distribution

Indo-West Pacific

Taxonomy

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Subclass: Eumalacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Anomura
Superfamily: Galatheoidea
Family: Porcellanidae
Genus: Pachycheles
Species: sculptus
Name Published Year: 1837
Scientific Name Authorship: H. Milne Edwards
Commercial Impact: 

None

Conservation Assessment: Least Concern

Net Conservation Benefits Fund

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Western Australian Museum Collections https://museum.wa.gov.au/online-collections/names/Pachycheles-sculptus
Accessed 24 Aug 2025

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