Caramel Nudibranch

Glossodoris rufomarginata

Nudibranchs
IUCN: Not evaluated

Usual depth4–20 m
Water temperature19–30 °C
Best monthsApril, May, and July
How commonOccasional

Photo credit: (c) cello caruso-turiello, some rights reserved (CC BY), uploaded by cello caruso-turiello · CC BY · iNaturalist

About this species

Glossodoris rufomarginata, commonly called white-margin sea slug or caramel nudibranch, is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

Text from the Wikipedia article “Glossodoris rufomarginata”, 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: 86 records
February: 108 records
March: 104 records
April: 183 records
May: 175 records
June: 165 records
July: 167 records
August: 162 records
September: 162 records
October: 153 records
November: 123 records
December: 120 records

Depth and water temperature

Depth

Mostly recorded at 4–20 m · Deepest record: 91.5 m

0–10 m: 61 records
10–20 m: 86 records
20–30 m: 22 records
30–40 m: 2 records
40–50 m: 0 records
50–60 m: 2 records
60–70 m: 0 records
70–80 m: 0 records
80–90 m: 0 records
90–100 m: 1 records

Water temperature

Recorded in surface water of 19–30 °C

18–20 °C: 9 records
20–22 °C: 48 records
22–24 °C: 25 records
24–26 °C: 51 records
26–28 °C: 26 records
28–30 °C: 117 records

Photos

no rights reserved · CC0 1.0 · iNaturalist
(c) cello caruso-turiello, 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) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
no rights reserved · CC0 1.0 · iNaturalist
(c) Debra Baker, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Caramel Nudibranch, Red-margined Glossodoris, White-margin Sea Slug

Names in 3 more languages

French: Doris à bord roux
Japanese: キャラメルウミウシ
Simplified Chinese: 橘色多彩海牛, 橘色多彩海麒麟, 紅邊多彩海蛞蝓

Other scientific names: Casella rufomarginata, Chromodoris rufomarginata, Chromodoris youngbleuthi, Chromolaichma youngbleuthi, Glossodoris youngbleuthi

Similar species

White Mantle Glossodoris
Glossodoris buko
White-patched Rainbow Dorid
Glossodoris pallida
Girdled Glossodoris
Glossodoris cincta
Pastel Rainbow Dorid
Glossodoris hikuerensis
Slender ceratosoma nudibranch
Ceratosoma gracillimum
Elongate Pantechnicon Dorid
Ceratosoma tenue

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).
499 open-data records from 1955 to 2026.
Species data updated October 26, 2026.

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