Metacarcinus novaezelandiae

Piecrust crab
Metacarcinus novaezelandiae
Metacarcinus novaezelandiae, adult, Port Phillip Bay, Photo: Antonia Cooper


Temperate Australasia


Large claws and a distinctively shaped carapace that is typical of the family. The species has probably been introduced into Tasmania from New Zealand, as it had not been recorded in this country before the 20th century.


Max Size: 19 cm

Sea Temperature Range: 10.3-19.6°C

Depth: 0-20m

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Infrequent (5.6% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Few (2 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney