Blackass Blenny
Ecsenius lividanalis
- Usual depth3–18 m
- Water temperature28–29 °C
- Best monthsMarch, October, and November
- How commonRare
Photo credit: (c) Roger Rittmaster, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Ecsenius lividanalis, known commonly as the blue-head combtooth-blenny in Indonesia and also known as the blue-headed combtooth blenny, is a species of combtooth blenny in the genus Ecsenius. It is found in coral reefs throughout the western Pacific ocean. It can reach a maximum length of 5 centimetres. Blennies in this species feed primarily off of plants, including benthic algae and weeds, and are commercial aquarium fish. There are two colour forms of this blenny, both of which have a black spot around the anus. One form has a blue head with a yellow body and iris while the other form is dark, occasionally all yellow, with a bluish-white iris, a yellow back and a yellow caudal fin.
Text from the Wikipedia article “Ecsenius lividanalis”, 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: 10 records
- February: 4 records
- March: 13 records
- April: 8 records
- May: 7 records
- June: 2 records
- July: 7 records
- August: 8 records
- September: 5 records
- October: 15 records
- November: 15 records
- December: 5 records
Depth and water temperature
Depth
Mostly recorded at 3–18 m · Deepest record: 27.5 m
Water temperature
Recorded in surface water of 28–29 °C
Photos
no rights reserved · CC0 1.0 · iNaturalist 
(c) Piotr Lukasik, 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
Names and classification
- English
- Blackass Blenny, Blackass Combtooth Blenny, Blackspot Blenny, Blackspot Coralblenny, Blue-head Combtooth Blenny
Names in 1 more languages
- Spanish
- Blenio de Cabeza Negra
Other scientific names: Ecsenius lividinalis
Similar species
Bicolor BlennyEcsenius bicolor
Great Barrier Reef BlennyEcsenius stictus
Coral BlennyEcsenius yaeyamaensis
Fourline BlennyEcsenius aequalis
Aron's blennyEcsenius aroni
Australian BlennyEcsenius australianus
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).
- 89 open-data records from 1972 to 2021.
- Species data updated November 2, 2026.
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