DiscoverSpeciesCorals and anemones
Lesser knob coral
Cyphastrea decadia
- Usual depth3–12 m
- Water temperature24–29 °C
- Best monthsMay
- How commonRare
Photo credit: (c) Debra Baker, some rights reserved (CC BY), uploaded by Debra Baker · CC BY · iNaturalist
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 9 records
- February: 5 records
- March: 1 records
- April: 1 records
- May: 20 records
- June: 2 records
- July: 3 records
- August: 6 records
- September: 7 records
- October: 0 records
- November: 1 records
- December: 7 records
Depth and water temperature
Depth
Mostly recorded at 3–12 m · Deepest record: 15 m
Water temperature
Recorded in surface water of 24–29 °C
Photos
(c) Debra Baker, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Debra Baker, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- Lesser knob coral, lesser knob coral
Names in 1 more languages
- Japanese
- エダトゲキクメイシ
Similar species
Lesser knob coralCyphastrea chalcidicum
Lesser knob coralCyphastrea microphthalma
Lesser knob coralCyphastrea ocellina
Lesser knob coralCyphastrea serailia
- Lesser knob coral
Cyphastrea agassizi
- Lesser knob coral
Cyphastrea japonica
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).
- 85 open-data records from 1980 to 2010.
- Species data updated November 2, 2026.
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