rough rock crab
Nectocarcinus integrifrons
- Usual depth2–14 m
- Water temperature14–20 °C
- Best monthsOctober
- How commonOccasional
Photo credit: (c) ttsquid, 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: 83 records
- February: 84 records
- March: 58 records
- April: 60 records
- May: 64 records
- June: 95 records
- July: 177 records
- August: 295 records
- September: 690 records
- October: 1,887 records
- November: 597 records
- December: 81 records
Depth and water temperature
Depth
Mostly recorded at 2–14 m · Deepest record: 13.5 m
Water temperature
Recorded in surface water of 14–20 °C
Photos
(c) ttsquid, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Tim, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist 
(c) Tim, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) coenobita, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Peter Crowcroft, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Moss Hepworth, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- rough rock crab
Other scientific names: Nectocarcinus melanodactylus, Portunus integrifrons
Similar species
Velvet CrabNectocarcinus tuberculosus
Red Swimming CrabNectocarcinus antarcticus
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).
- 303 open-data records from 1920 to 2023.
- Species data updated November 4, 2026.
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