Animal Species:Rock Crab

The Rock Crab is a common Sydney species found under rocks around the low-tide mark.

Rock Crab sitting in water

Dr Isobel Bennett © Australian Museum

Standard Common Name

Rock Crab

Identification

The Rock Crab has a chunky, solid body that can vary from white to red-brown throughout different stages of its life. Its most distinctive feature is the massive claws that are always brown-black with lighter tips. These strong claws are used to feed on a variety of prey, including snails and limpets.

Size range

6 cm

Distribution

Rock Crabs are found in Southern Queensland, New South Wales, Victoria, South Australia, Tasmania to Perth in Western Australia.

Habitat

Rock Crabs live on intertidal rocky shores.

Feeding and Diet

Rock Crabs feed on a variety of prey, including snails and limpets.

Classification

Species:
truncatus
Genus:
Ozius
Subfamily:
Oziinae
Family:
Eriphiidae
Infraorder:
Brachyura
Suborder:
Pleocyemata
Order:
Decapoda
Class:
Malacostraca
Subphylum:
Crustacea
Phylum:
Arthopoda
Kingdom:
Animalia

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Tags crabs, crustaceans, arthropods, invertebrates, wildlife of sydney, identification,