Ridged Venus

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 122 records
February: 71 records
March: 79 records
April: 123 records
May: 56 records
June: 45 records
July: 49 records
August: 35 records
September: 92 records
October: 95 records
November: 56 records
December: 50 records

Depth and water temperature

Depth

Mostly recorded at 0 m · Deepest record: 12.5 m

0–10 m: 102 records
10–20 m: 1 records

Water temperature

Recorded in surface water of 14–20 °C

12–14 °C: 74 records
14–16 °C: 292 records
16–18 °C: 19 records
18–20 °C: 24 records
20–22 °C: 9 records

Photos

(c) Terra Occ, some rights reserved (CC BY), uploaded by Terra Occ · CC BY · iNaturalist
(c) Terra Occ, some rights reserved (CC BY), uploaded by Terra Occ · CC BY · iNaturalist
(c) ttsquid, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Rod Lowther, some rights reserved (CC BY) · CC BY · iNaturalist
(c) ttsquid, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Terra Occ, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Terra Occ, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Ridged Venus

Other scientific names: Katelysia enigma, Marcia (Katelysia) rhytiphora, Venus corrugata

Similar species

Enigma Venus
Katelysia scalarina
Mud Cockle
Katelysia peronii
New Zealand Cockle
Austrovenus stutchburyi
Cherry stones
Mercenaria mercenaria
Wedding-cake venus
Bassina disjecta
Cockle-like Venus
Chioneryx cardioides

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).
653 open-data records from 1916 to 2017.
Species data updated November 3, 2026.