Hooded ark

Cucullaea labiata

Molluscs
IUCN: Not evaluated

Usual depth20–87 m
Water temperature20–30 °C
Best monthsJune and November
How commonRare

All species

Photo credit: (c) Shellnut, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist

About this species

Cucullaea labiata is a species of saltwater clam or ark shell, a marine bivalve mollusk in the family Cucullaeidae.

Text from the Wikipedia article “Cucullaea labiata”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 7 records
February: 5 records
March: 9 records
April: 6 records
May: 5 records
June: 14 records
July: 5 records
August: 5 records
September: 3 records
October: 12 records
November: 23 records
December: 10 records

Depth and water temperature

Depth

Mostly recorded at 20–87 m · Deepest record: 111.5 m

20–30 m: 2 records
30–40 m: 2 records
40–50 m: 2 records
50–60 m: 1 records
60–70 m: 2 records
70–80 m: 0 records
80–90 m: 2 records
90–100 m: 0 records
100–110 m: 0 records
110–120 m: 1 records

Water temperature

Recorded in surface water of 20–30 °C

18–20 °C: 1 records
20–22 °C: 3 records
22–24 °C: 23 records
24–26 °C: 24 records
26–28 °C: 30 records
28–30 °C: 37 records

Photos

Names and classification

English: Hooded ark, Hooded ark shell, Common Cowl Shell, hooded ark, hooded ark shell

Names in 3 more languages

German: Hauben-Archenmuschel
Japanese: ヌノメアカガイ
Simplified Chinese: 圓魁蛤

Other scientific names: Arca concamera, Arca concamerata, Arca cucullata, Arca cucullus, Arca labiata, Cucullaea auriculifera, Cucullaea cucullata, Cucullaea plicata

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.
Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
Conservation status as published by GBIF (IUCN Red List).
216 open-data records from 1903 to 2010.
Species data updated November 1, 2026.

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