Fourlined tonguesole
Cynoglossus bilineatus
- Usual depth2–24 m
- Water temperature23–30 °C
- Best monthsJune, August, and October
- How commonRare
About this species
Cynoglossus quadrilineatus, the fourlined tonguesole, is a species of tonguefish native to the Indian Ocean from Pakistan to the western Pacific Ocean where it occurs from Japan to northern Australia. It can be found in marine and brackish waters in estuaries and coastal waters out to the continental shelf at depths of from 10 to 400 metres. This species can reach a length of 44 centimetres (17 in) SL though most do not exceed 30 centimetres (12 in) SL. It is important in local commercial fisheries.
Text from the Wikipedia article “Cynoglossus quadrilineatus”, 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: 0 records
- February: 5 records
- March: 6 records
- April: 6 records
- May: 5 records
- June: 10 records
- July: 4 records
- August: 7 records
- September: 6 records
- October: 7 records
- November: 5 records
- December: 3 records
Depth and water temperature
Depth
Mostly recorded at 2–24 m · Deepest record: 37 m
Water temperature
Recorded in surface water of 23–30 °C
Names and classification
- English
- Fourlined tonguesole, fourlined tonguesole, fourlin tonguesole, ohshitabirame, twolined tonguesole, twolin tonguesole
Names in 1 more languages
- Japanese
- オオウシノシタ, オオシタビラメ
Other scientific names: Achirus bilineatus, Arelia bilineata, Cynoglossus bilinetaus
Similar species
Speckled TonguesoleCynoglossus puncticeps
- Bengal tonguesole
Cynoglossus cynoglossus
- Kop's Tonguesole
Cynoglossus kopsii
- Suyen's Tongue Sole
Cynoglossus suyeni
- Doublelined Tonguesole
Paraplagusia bilineata
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).
- 265 open-data records from 1802 to 2022.
- Species data updated October 26, 2026.
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