Malleus regula
- Usual depth30–40 m
- Water temperature19–30 °C
- Best monthsAugust, September, and October
- How commonRare
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 10 records
- February: 9 records
- March: 8 records
- April: 4 records
- May: 7 records
- June: 5 records
- July: 4 records
- August: 12 records
- September: 12 records
- October: 15 records
- November: 12 records
- December: 11 records
Depth and water temperature
Depth
Mostly recorded at 30–40 m · Deepest record: 40 m
Water temperature
Recorded in surface water of 19–30 °C
Names and classification
Names in 1 more languages
- Japanese
- ニワトリガキ
Other scientific names: Fundella lioyi, Himantopoda truncata, Malleus (Malvufundus) regulus, Malleus aquatilis, Malleus decurtatus, Malleus maculosus, Malleus obvolutus, Malleus panamensis, Malleus regularis, Malleus regulus, Malleus rufipunctatus, Malleus solitarius, Malleus vesiculatus, Malleus vulsellatus, Malvufundus regula, Ostrea regula, Ostrea valsella, Parimalleus cursator, Parimalleus rex, Pinna aenigmatica, Pinna saccata, Vulsella nuttalli
Similar species
Southern hammer oysterMalleus meridianus
American hammer oysterMalleus albus
Common hammer-oysterMalleus malleus
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).
- 297 open-data records from 1775 to 2024.
- Species data updated November 4, 2026.
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