
Triple-margined dorid
Goniobranchus trimarginatus
- Usual depth16–20 m
- Water temperature28–30 °C
- Best monthsAugust
- How commonRare
Photo credit: (c) Shaunak Modi, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Goniobranchus trimarginatus is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Text from the Wikipedia article “Goniobranchus trimarginatus”, 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: 5 records
- March: 5 records
- April: 6 records
- May: 10 records
- June: 5 records
- July: 9 records
- August: 18 records
- September: 6 records
- October: 4 records
- November: 7 records
- December: 8 records
Depth and water temperature
Depth
Mostly recorded at 16–20 m · Deepest record: 20 m
Water temperature
Recorded in surface water of 28–30 °C
Photos

(c) Shaunak Modi, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- Triple-margined dorid
Other scientific names: Chromodoris trimarginata, Glossodoris trimarginata
Similar species
Coi's GoniobranchusGoniobranchus coi
Collingwood's GoniobranchusGoniobranchus collingwoodi
Daphne’s NudibranchGoniobranchus daphne

Fiesta Rainbow DoridGoniobranchus fidelis
Geometric Rainbow DoridGoniobranchus geometricus
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).
- 16 open-data records from 1998 to 2019.
- Species data updated November 3, 2026.
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