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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Brachyurans > Family Trapezioidea
Bandit coral crab
Tetralia nigrolineata

Family Tetraliidae
updated Dec 2019

Where seen? This tiny crab with a dark band across the face is sometimes seen in branching Acropora corals (Acropora sp.) on our Southern shores. Usually more than one crab is seen in a single colony. Small, quick and flattened, they move around quickly among the coral branches and are hard to spot and photograph.

Features: Body width about 1cm, body flat, claws with pointed pincers. Body, legs and pincers brownish to beige. Across the eyes, a narrow dark band with a fine glittering blue line on the lower edge of this band.

What does it eat? It feeds on the mucus produced by the hard coral, gathering these with the minute comb-like structures at the tips of its feet.

Tanah Merah, Jul 11
Photo shared by Loh Kok Sheng on his blog.

Terumbu Pempang Laut, Aug 16
Photo shared by Loh Kok Sheng on facebook.

Sisters Island, Mar 06

Bandit coral crabs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Tanah Merah, Jun 10
Photo shared by Loh Kok Sheng on his blog.



Tanah Merah, Jun 10
Photo shared by James Koh on his blog.



Tanah Merah, May 13
Photo shared by Loh Kok Sheng on his blog.




Sisters Islands, Jul 14
Photo shared by Loh Kok Sheng on his blog.



Terumbu Selegie, Jun 11
Photo shared by James Koh on his blog.

Kusu Island, May 10
Photo shared by James Koh on his blog..




Pulau Semakau South, Jul 15
Photo shared by Neo Mei Lin on her blog.



Pulau Semakau East, Jul 18
Photo shared by Jesselyn Chua on facebook.



Pulau Hantu, Jul 15
Photo shared by Marcus Ng on facebook.




Terumbu Raya, Mar 16
Photo shared by Marcus Ng on facebook



Raffles Lighthouse, Nov 16
Photo shared by Heng Pei Yan on facebook.



Raffles Lighthouse, Aug 16
Photo shared by Marcus Ng on facebook.




Terumbu Salu, Jan 10

Photo shared by Loh Kok Sheng on his flickr.

Pulau Senang, Jun 10
Photo shared by Marcus Ng on flickr.

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.
  • 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.
  • Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore. National Council on the Environment. 163pp.
  • 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.
  • Jones Diana S. and Gary J. Morgan, 2002. A Field Guide to Crustaceans of Australian Waters. Reed New Holland. 224 pp.
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