Hawaiian Blackhead Triplefin
Enneapterygius atriceps
- Usual depth4.3 m
- Water temperature25–25 °C
- Best monthsJanuary, February, and December
- How commonRare
Photo credit: (c) Robin White, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
The Hawaiian blackhead triplefin, also known as the Hawaiian triplefin in Hawaii, is a species of triplefin blenny in the genus Enneapterygius. It is a tropical blenny found in coral reefs in the Pacific Ocean, from the Hawaiian Islands, French Frigate Shoals, Laysan Island, and Midway Atoll. Blennies in this species swim at a depth range of 1–23 metres, and inhabit dead coral and rock.
Text from the Wikipedia article “Hawaiian blackhead triplefin”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 15 records
- February: 10 records
- March: 4 records
- April: 6 records
- May: 10 records
- June: 10 records
- July: 8 records
- August: 6 records
- September: 3 records
- October: 9 records
- November: 6 records
- December: 11 records
Depth and water temperature
Depth
Mostly recorded at 4.3 m · Deepest record: 4.3 m
Water temperature
Recorded in surface water of 25–25 °C
Photos
(c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist 
(c) Thomas Irvine, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Thomas Irvine, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- Hawaiian Blackhead Triplefin, Hawaiian Triplefin
Other scientific names: Tripterygium atriceps
Similar species
Blackthroat TriplefinEnneapterygius atrogulare
Black-cheek ThreefinEnneapterygius rufopileus
Highfin ThreefinEnneapterygius tutuilae
Yellow triplefinEnneapterygius abeli
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.
- Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
- Conservation status as published by GBIF (IUCN Red List).
- 28 open-data records from 1889 to 1994.
- Species data updated November 2, 2026.
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