Blind tassel-fish
Eleutheronema tetradactylum
- Usual depth1–4 m
- Water temperature20–30 °C
- Best monthsMay, June, and August
- How commonOccasional
Photo credit: (c) Ong Jyh Seng, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Eleutheronema tetradactylum, the fourfinger threadfin, known as rawas in India is a species of marine ray-finned fish, a threadfin from the family Polynemidae which occurs in the Indian and western Pacific Ocean.
Text from the Wikipedia article “Eleutheronema tetradactylum”, 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: 69 records
- February: 134 records
- March: 87 records
- April: 90 records
- May: 294 records
- June: 293 records
- July: 114 records
- August: 214 records
- September: 108 records
- October: 186 records
- November: 135 records
- December: 122 records
Depth and water temperature
Depth
Mostly recorded at 1–4 m · Deepest record: 30 m
Water temperature
Recorded in surface water of 20–30 °C
Photos
(c) Ong Jyh Seng, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Shaunak Modi, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Ashwit Shetty, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Belinda Forbes, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Ashwit Shetty, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- Blind tassel-fish, Blue salmon, Blue threadfin, Bluenose salmon, Blunt-nosed salmon, Colonial salmon, blind tassel-fish, bluenose salmon, blue salmon, blue threadfin, blunt-nosed salmon, colonial salmon, cooktown salmon, fourfinger threadfin, Fourfinger threadfin, giant threadfin, rockhampton salmon
Names in 5 more languages
- Spanish
- barbudo de cuatro dedos
- Filipino
- bikau, hugao, huhau, kagau, kugao, mamali, pugao
- French
- barbure à quatre doigts, Barbure mamalí
- Indonesian
- baling, kesumbang, kurau, lausan, sumbal
- Japanese
- ミナミコノシロ
Other scientific names: Eleutheronema tetradactyla, Eleutheronema tetradactylus, Eleuthronema tetradactylum, Polynemus coecus, Polynemus teria, Polynemus tetradactylus
Similar species
- Sevenfinger threadfin
Filimanus heptadactyla
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).
- 2,983 open-data records from 1804 to 2022.
- Species data updated October 26, 2026.
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