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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Brachyurans > Family Xanthidae
Ruby reef crab
Actaea sp.

Family Xanthidae
updated Dec 2019

Where seen? This tiny jewel of a crab was seen once on Labrador.

Features: Body width 1-2cm. Body and claws bright red with bumps and ridges. Like other brightly coloured Xanthid crabs, it is probably poisonous.

Labrador, Jul 05

Ruby reef crabs on Singapore shores
On wildsingapore flickr

With grateful thanks to Prof Leo Tan for finding this crab. And to Ondrej Radosta for correcting the identity of the crab.


  • 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.
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