
Tenellia nakapila
- Usual depth6–20 m
- Water temperature20–29 °C
- Best monthsApril, May, and August
- How commonRare
Photo credit: (c) Ewout Knoester, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 16 records
- February: 22 records
- March: 27 records
- April: 38 records
- May: 32 records
- June: 24 records
- July: 18 records
- August: 35 records
- September: 25 records
- October: 26 records
- November: 19 records
- December: 16 records
Depth and water temperature
Depth
Mostly recorded at 6–20 m · Deepest record: 28 m
Water temperature
Recorded in surface water of 20–29 °C
Photos

(c) Gregor Bailar, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Dan Schofield, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) Gregor Bailar, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Ben Costamagna, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
Names and classification
Similar species
- Orange-blaze Roundhead
Tenellia ornata
drab aeolidPhestilla sibogae
Blackgill TenelliaPhestilla melanobrachia
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.
- 75 open-data records from 1988 to 2026.
- Species data updated October 26, 2026.
Log what you see on your next dive
The free DiveHive diver app keeps your logbook with every sighting and shows what lives at the site you dive next.