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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Brachyurans > Family Parthenopidae
Domed elbow crab
Cryptopodia fornicata
Family Parthenopidae
updated Dec 2019
Where seen? This strange crab is sometimes seen on our northern shores.

Features: Body width about 6cm. A domed body covers the spindly walking legs. Eyes tiny and close together at the top of a rather triangular head. The pincers are large and angular.

Status and threats: This crab is listed as 'Endangered' on the Red List of threatened animals of Singapore.

A domed body covers its limbs.
Changi, Jul 06

Large, angular pincers

Tiny eyes.

Beting Bronok, May 09

Carrying eggs.

Domed elbow crabs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Changi, Jun 12
Photo shared by Marcus Ng on flickr.

Terumbu Semakau, Mar 13
Photo shared by Loh Kok Sheng on his blog.

Beting Bronok, Nov 11
Photo shared by Loh Kok Sheng on his blog.

Chek Jawa, Jul 18
Photo shared by Toh Chay Hoon on facebook..

With grateful thanks to Prof Peter K. L. Ng of the Lee Kong Chian Natural History Museum for identifying this crab.



  • Debelius, Helmut, 2001. Crustacea Guide of the World: Atlantic Ocean, Indian Ocean, Pacific Ocean IKAN-Unterwasserachiv, Frankfurt. 321 pp.
  • Davison, G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore Red Data Book: Threatened plants and animals of Singapore. Nature Society (Singapore). 285 pp.
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