Two-tone Bluntnose

About this species

Samla bicolor is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Samlidae.

Text from the Wikipedia article “Samla bicolor”, 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: 138 records
February: 141 records
March: 143 records
April: 172 records
May: 140 records
June: 132 records
July: 170 records
August: 221 records
September: 191 records
October: 160 records
November: 161 records
December: 143 records

Depth and water temperature

Depth

Mostly recorded at 2–19 m · Deepest record: 62.5 m

0–10 m: 84 records
10–20 m: 54 records
20–30 m: 10 records
30–40 m: 2 records
40–50 m: 0 records
50–60 m: 2 records
60–70 m: 1 records

Water temperature

Recorded in surface water of 20–30 °C

18–20 °C: 1 records
20–22 °C: 7 records
22–24 °C: 9 records
24–26 °C: 41 records
26–28 °C: 22 records
28–30 °C: 114 records

Photos

(c) Debra Baker, some rights reserved (CC BY) · CC BY · iNaturalist
(c) portioid, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) portioid, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Ben Costamagna, some rights reserved (CC BY) · CC BY · iNaturalist
(c) 呂一起(Lyu yi-chi), some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Two-tone Bluntnose, Bicolor nudibranch

Names in 4 more languages

French: Flabelline bicolore
Japanese: ケラマミノウミウシ
Korean: 빨강꼭지도롱이갯민숭이
Simplified Chinese: 雙色扇羽海蛞蝓

Other scientific names: Coryphella ornata, Eolis bicolor, Flabellina alisonae, Flabellina bicolor, Samla annuligera

Similar species

Red-ringed Bluntnose
Samla bilas
Purple-ringed Bluntnose
Samla riwo
Orange-tipped Bluntnose
Samla macassarana

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).
475 open-data records from 1858 to 2026.
Species data updated October 26, 2026.