Blacktail Triplefin
Enneapterygius nigricauda
- Usual depth2–11 m
- Water temperature26–28 °C
- Best monthsMay and November
- How commonRare
About this species
Enneapterygius nigricauda, known commonly as the blacktail triplefin or the Pacific blacktail triplefin, is a species of triplefin blenny in the genus Enneapterygius. Like all triplefins, it has three dorsal fins. It was described by Ronald Fricke in 1997. It is found in the western Pacific Ocean from the Bonin Islands to Wake Island.
Text from the Wikipedia article “Enneapterygius nigricauda”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
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Best months
Worldwide (open data)
- January: 0 records
- February: 0 records
- March: 2 records
- April: 2 records
- May: 5 records
- June: 0 records
- July: 1 records
- August: 0 records
- September: 0 records
- October: 0 records
- November: 5 records
- December: 0 records
Depth and water temperature
Depth
Mostly recorded at 2–11 m · Deepest record: 11 m
Water temperature
Recorded in surface water of 26–28 °C
Names and classification
- English
- Blacktail Triplefin, Pacific Blacktail Triplefin
Similar species
Highfin ThreefinEnneapterygius tutuilae
- Blacktail Threefin
Enneapterygius bahasa
- Northern Bicoloured Triplefin
Enneapterygius flavoccipitis
- Blackbelly Triplefin
Enneapterygius fuscoventer
- Blackbelly Triplefin
Enneapterygius hemimelas
- Minute Triplefin
Enneapterygius minutus
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).
- 54 open-data records from 1965 to 2015.
- Species data updated October 26, 2026.
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