Cook's Pillbox Crab

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 19 records
February: 30 records
March: 9 records
April: 13 records
May: 19 records
June: 7 records
July: 7 records
August: 10 records
September: 32 records
October: 15 records
November: 18 records
December: 12 records

Depth and water temperature

Depth

Mostly recorded at 0–10 m · Deepest record: 20 m

0–10 m: 105 records
10–20 m: 3 records
20–30 m: 2 records

Water temperature

Recorded in surface water of 12–18 °C

10–12 °C: 7 records
12–14 °C: 21 records
14–16 °C: 7 records
16–18 °C: 76 records

Photos

(c) Kelvin Perrie, some rights reserved (CC BY), uploaded by Kelvin Perrie · CC BY · iNaturalist
(c) Kelvin Perrie, some rights reserved (CC BY), uploaded by Kelvin Perrie · CC BY · iNaturalist
(c) Luca Davenport-Thomas, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Uwe Schneehagen, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Kelvin Perrie, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Uwe Schneehagen, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Kelvin Perrie, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Cook's Pillbox Crab

Other scientific names: Hymenicus Cookii

Similar species

Three-pronged Spider Crab
Halicarcinus ovatus
Flattened Crab
Halicarcinus planatus
Flat Pillbox Crab
Halicarcinus quoyi
Variable pillbox crab
Halicarcinus varius
Estuarine Pillbox Crab
Halicarcinus whitei
Tong's Pillbox Crab
Halicarcinus tongi

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).
141 open-data records from 1927 to 2020.
Species data updated November 3, 2026.