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DiscoverSpeciesMolluscs

Rectangular false cockle

Cardita variegata

  • Molluscs
  • IUCN: Not evaluated
  • Usual depth2–173 m
  • Water temperature17–30 °C
  • Best monthsJuly, August, and December
  • How commonOccasional
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Photo credit: (c) Takaaki Hattori, some rights reserved (CC BY), uploaded by Takaaki Hattori · CC BY · iNaturalist

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

  • January: 28 records
  • February: 20 records
  • March: 25 records
  • April: 28 records
  • May: 25 records
  • June: 22 records
  • July: 36 records
  • August: 30 records
  • September: 26 records
  • October: 29 records
  • November: 30 records
  • December: 50 records

Depth and water temperature

Depth

Mostly recorded at 2–173 m · Deepest record: 172.5 m

  • 0–10 m: 5 records
  • 10–20 m: 1 records
  • 20–30 m: 0 records
  • 30–40 m: 0 records
  • 40–50 m: 0 records
  • 50–60 m: 0 records
  • 60–70 m: 0 records
  • 70–80 m: 0 records
  • 80–90 m: 0 records
  • 90–100 m: 0 records
  • 100–110 m: 0 records
  • 110+ m: 1 records

Water temperature

Recorded in surface water of 17–30 °C

  • 16–18 °C: 1 records
  • 18–20 °C: 0 records
  • 20–22 °C: 27 records
  • 22–24 °C: 32 records
  • 24–26 °C: 69 records
  • 26–28 °C: 84 records
  • 28–30 °C: 71 records

Names and classification

English
Rectangular false cockle, rectangular false cockle
Names in 2 more languages
Japanese
クロフトマヤガイ
Simplified Chinese
算盤蛤

Other scientific names: Beguina variegata, Cardita inflata, Cardita radula, Mytilicardia variegata

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).
  • 704 open-data records from 1792 to 2022.
  • Species data updated October 26, 2026.

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