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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Brachyurans > Superfamily Majoidea
Sea toad spider crab
Schizophrys sp.*

Family Majidae
updated Oct 08

Where seen? This large squat crab is sometimes seen on some of our shores, clinging to coral rubble, large boulders or hiding under living corals. A slow moving crab.

Features: Body width 4-5cm. Body teardrop-shaped with large spines on the sides. Pincers long and cylindrical. Body and walking legs covered with filaments and some have small bits and pieces stuck on their bodies, but they are not as well 'decorated' as the Velcro crabs (Camposcia retusa).

Raffles Lighthouse, Jul 06

Sea toad spider crabs on Singapore shores

Seen from the front.
Pulau Sekudu, May 08

One pincer bigger than the other.

Eyes wide apart.


Changi, May 09

more photos of sea toad spider crabs on Singapore shores
part 1 | part 2

*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Links References
  • Ng, Peter K. L. and Daniele Guinot and Peter J. F. Davie, 2008. Systema Brachyurorum: Part 1. An annotated checklist of extant Brachyuran crabs of the world. The Raffles Bulletin of Zoology. Supplement No. 17, 31 Jan 2008. 286 pp. (Online PDF on the Raffles Bulletin of Zoology website)
  • Lim, S., P. Ng, L. Tan, & W. Y. Chin, 1994. Rhythm of the Sea: The Life and Times of Labrador Beach. Division of Biology, School of Science, Nanyang Technological University & Department of Zoology, the National University of Singapore. 160 pp.
  • Jones Diana S. and Gary J. Morgan, 2002. A Field Guide to Crustaceans of Australian Waters. Reed New Holland. 224 pp.
  • Debelius, Helmut, 2001. Crustacea Guide of the World: Atlantic Ocean, Indian Ocean, Pacific Ocean IKAN-Unterwasserachiv, Frankfurt. 321 pp.
  • Gosliner, Terrence M., David W. Behrens and Gary C. Williams. 1996. Coral Reef Animals of the Indo-Pacific: Animal life from Africa to Hawai’I exclusive of the vertebrates Sea Challengers. 314pp.
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