
Army Crab
Dotilla fenestrata
- Water temperature23–27 °C
- Best monthsJanuary, February, and November
- How commonRare
Photo credit: (c) Diogo Luiz, some rights reserved (CC BY) · CC BY · iNaturalist
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 8 records
- February: 8 records
- March: 3 records
- April: 3 records
- May: 6 records
- June: 7 records
- July: 7 records
- August: 7 records
- September: 5 records
- October: 5 records
- November: 10 records
- December: 3 records
Depth and water temperature
Water temperature
Recorded in surface water of 23–27 °C
Photos

no rights reserved · CC0 1.0 · iNaturalist 
(c) Diogo Luiz, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist 
(c) Jana, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Benjamin Carbuccia, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist
Names and classification
- English
- Army Crab
Other scientific names: Dotilla clepsydra
Similar species

Asian Soldier CrabDotilla myctiroides

White semaphore crabIlyoplax delsmani
Sources and credits
Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).
- Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
- Conservation status as published by GBIF (IUCN Red List).
- 44 open-data records from 1869 to 1998.
- Species data updated November 2, 2026.
Log what you see on your next dive
The free DiveHive diver app keeps your logbook with every sighting and shows what lives at the site you dive next.