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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Anomurans > hermit crabs
Tidal hermit crab
Diogenes sp.*
Family Diogenidae
updated Dec 2019
if you learn only 3 things about them ...
They come in all sizes from tiny ones you can hardly see, to larger ones.
Every empty shell is a potential hermit crab home. Don't take any shells home!
Many other animals live together with a hermit crab. Look for them.

Where seen? This little hermit crab is commonly seen on many of our shores, on silty or sandy areas and among seagrasses. Sometimes in groups of many individuals, even when the tide is not very low. Many but not all of these hermit crabs may be Diogenes sp.

Features: Body about 1-2cm long. Body and limbs not very hairy. Colour grey, brown or white without obvious markings. The left pincer is usually much larger than the right.

Pulau Semakau, Feb 09

Changi, Aug 05

Changi, Jun 05
Tidal hermit crabs (Diogenes sp.) and Orange-striped hermit crab (Clibanarius infraspinatus) East Coast Park, Oct 2017

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

Tidal hermit crabs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Big Sisters Island, Feb 21
Photo shared by Joleen Chan on facebook.

Pulau Tekukor, Nov 20
Photo shared by Marcus Ng on facebook.

Cyrene Reef, Feb 16
Photo shared by Marcus Ng on facebook.

Cyrene Reef, Feb 16
Photo shared by Heng Pei Yan on facebook.
Berlayar Creek, Nov 2020

Links References
  • 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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