Round Toothed Oyster
Isognomon ephippium
- Usual depth1–6 m
- Water temperature15–30 °C
- Best monthsMarch, July, and August
- How commonRare
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 5 records
- February: 9 records
- March: 10 records
- April: 2 records
- May: 4 records
- June: 4 records
- July: 12 records
- August: 13 records
- September: 10 records
- October: 9 records
- November: 3 records
- December: 3 records
Depth and water temperature
Depth
Mostly recorded at 1–6 m · Deepest record: 5.5 m
Water temperature
Recorded in surface water of 15–30 °C
Names and classification
- English
- Round Toothed Oyster, Saddle Tree Oyster
Names in 3 more languages
- Japanese
- マクガイ
- Korean
- 부리말다래조개
- Simplified Chinese
- 扁平鉗蛤, 馬鞍障泥蛤
Other scientific names: Isogonum scapula, Melina ephippium, Melina periculosa, Ostrea ephippium, Perna argillacea, Perna cumingii, Perna imbricata, Perna lamarckiana, Perna reeveana, Perna spathulata
Similar species
- Elongate Toothed Oyster
Isognomon isognomum
- Brown Purse Shell
Isognomon perna
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).
- 205 open-data records from 1758 to 2022.
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