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Fourline tonguesole

Cynoglossus attenuatus

  • Fish
  • IUCN: Least concern
  • Usual depth20–40 m
  • Water temperature23–29 °C
  • Best monthsMay and October
  • How commonRare
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About this species

Cynoglossus attenuatus, commonly known as the Fourline tonguesole, is a species of tonguefish. It is commonly found in the western Indian Ocean off the eastern coast of Africa, from Delagoa Bay, Mozambique to Durban in South Africa.

Text from the Wikipedia article “Cynoglossus attenuatus”, 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: 1 records
  • February: 1 records
  • March: 1 records
  • April: 1 records
  • May: 6 records
  • June: 1 records
  • July: 3 records
  • August: 1 records
  • September: 0 records
  • October: 5 records
  • November: 0 records
  • December: 0 records

Depth and water temperature

Depth

Mostly recorded at 20–40 m · Deepest record: 150 m

  • 0–10 m: 1 records
  • 10–20 m: 0 records
  • 20–30 m: 4 records
  • 30–40 m: 2 records
  • 40–50 m: 4 records
  • 50–60 m: 0 records
  • 60–70 m: 0 records
  • 70–80 m: 0 records
  • 80–90 m: 0 records
  • 90–100 m: 0 records
  • 100–110 m: 0 records
  • 110+ m: 1 records

Water temperature

Recorded in surface water of 23–29 °C

  • 22–24 °C: 10 records
  • 24–26 °C: 4 records
  • 26–28 °C: 8 records
  • 28–30 °C: 1 records

Names and classification

English
Fourline tonguesole, fourline tonguesole, Fourline Toungefish, Fourline Toungesole

Other scientific names: Arelia attenuata

Similar species

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).
  • 98 open-data records from 1918 to 2011.
  • Species data updated November 2, 2026.

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