What's on the move

Blue swimmer crab

Portunus armatus

(Image credit: PIRSA Fisheries and Aquaculture)

Blue swimmer crabs are generally distinguished by the long spine projecting from each side of the carapace and the fact that their last pair of legs is modified as swimming paddles. Males are blue and have larger claws than females, which are green-brown in colour.

Length: Up to 21 cm


Sheltered sand, seagrass; 0-50 m depth

Log it

In South Australia, log this species outside the Gulfs but east of Port Lincoln

Related links/info

Species names on the Redmap site are based on the Codes for Australian Aquatic Biota or CAAB (http://www.cmar.csiro.au/caab/). This is updated regularly and lists the approved common name, family, species name and more.

Number of sightings 1

Redmap is funded by

Lead institutes