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DiscoverSpeciesCrustaceans

Flattened Crab

Halicarcinus planatus

  • Crustaceans
  • IUCN: Not evaluated
  • Usual depth0–25 m
  • Water temperature4–18 °C
  • Best monthsJanuary and December
  • How commonRare
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Photo credit: no rights reserved · CC0 1.0 · iNaturalist

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

  • January: 76 records
  • February: 32 records
  • March: 29 records
  • April: 23 records
  • May: 13 records
  • June: 5 records
  • July: 3 records
  • August: 18 records
  • September: 11 records
  • October: 5 records
  • November: 36 records
  • December: 52 records

Depth and water temperature

Depth

Mostly recorded at 0–25 m · Deepest record: 139 m

  • 0–10 m: 92 records
  • 10–20 m: 17 records
  • 20–30 m: 3 records
  • 30–40 m: 0 records
  • 40–50 m: 2 records
  • 50–60 m: 2 records
  • 60–70 m: 1 records
  • 70–80 m: 0 records
  • 80–90 m: 1 records
  • 90–100 m: 1 records
  • 100–110 m: 0 records
  • 110+ m: 3 records

Water temperature

Recorded in surface water of 4–18 °C

  • 2–4 °C: 18 records
  • 4–6 °C: 133 records
  • 6–8 °C: 41 records
  • 8–10 °C: 24 records
  • 10–12 °C: 1 records
  • 12–14 °C: 3 records
  • 14–16 °C: 23 records
  • 16–18 °C: 22 records

Names and classification

English
Flattened Crab
Names in 1 more languages
Spanish
Cangrejito aplanado

Other scientific names: Cancer orbiculus, Cancer planatus, Elamena mexicana, Elamene mexicana, Halicarcinus leachi, Halicarcinus pubescens, Hymenosoma leachii, Hymenosoma tridentata, Liriopea Lucasii

Similar species

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).
  • 471 open-data records from 1907 to 2019.
  • Species data updated November 3, 2026.

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