Indian gold-ring bristle-tooth

About this species

Ctenochaetus truncatus, the Indian gold-ring bristletooth, squaretail bristletooth, yelloweye bristletooth, truncate bristletooth or spotted yellow eye tang, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This fish is found in the Indian Ocean.

Text from the Wikipedia article “Ctenochaetus truncatus”, 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: 22 records
February: 348 records
March: 207 records
April: 46 records
May: 44 records
June: 24 records
July: 21 records
August: 17 records
September: 29 records
October: 45 records
November: 48 records
December: 38 records

Depth and water temperature

Depth

Mostly recorded at 6–25 m · Deepest record: 36 m

0–10 m: 162 records
10–20 m: 229 records
20–30 m: 87 records
30–40 m: 29 records

Water temperature

Recorded in surface water of 24–29 °C

22–24 °C: 1 records
24–26 °C: 34 records
26–28 °C: 595 records
28–30 °C: 23 records

Photos

(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Storm Martin, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Ewout Knoester, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Ewout Knoester, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Rose Zappa, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Zach Johnson, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Indian gold-ring bristle-tooth, Indian Gold-ring Bristletooth, Squaretail Bristletooth, Squaretail Bristletooth Tang, Yelloweye bristletooth

Names in 3 more languages

German: Indischer Goldringdoktor
Spanish: Pez Cirujano Punteado de Ojo Amarillo
French: Chirurgien anneau d'or

Similar species

Bluelip Bristletooth
Ctenochaetus cyanocheilus
Lined bristletooth
Ctenochaetus striatus
Spotted surgeonfish
Ctenochaetus strigosus
Twospot surgeonfish
Ctenochaetus binotatus
Pale-tailed Bristletooth
Ctenochaetus flavicauda
Black Surgeonfish
Ctenochaetus hawaiiensis

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).
816 open-data records from 1950 to 2023.
Species data updated November 1, 2026.