Blue-spotted Wrinkle Dorid

About this species

Tambja morosa, also known as Tambja kushimotoensis or gloomy nudibranch, is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the subfamily Nembrothinae within the family Polyceridae.

Text from the Wikipedia article “Tambja morosa”, 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: 158 records
February: 177 records
March: 178 records
April: 165 records
May: 122 records
June: 80 records
July: 133 records
August: 136 records
September: 107 records
October: 122 records
November: 137 records
December: 150 records

Depth and water temperature

Depth

Mostly recorded at 7–23 m · Deepest record: 75 m

0–10 m: 25 records
10–20 m: 83 records
20–30 m: 20 records
30–40 m: 6 records
40–50 m: 0 records
50–60 m: 0 records
60–70 m: 0 records
70–80 m: 1 records

Water temperature

Recorded in surface water of 17–30 °C

16–18 °C: 2 records
18–20 °C: 4 records
20–22 °C: 15 records
22–24 °C: 17 records
24–26 °C: 39 records
26–28 °C: 28 records
28–30 °C: 106 records

Photos

(c) Steve Childs, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Robin White, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Luca Davenport-Thomas, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Jay Paroline, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Henrik Kibak, 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: Blue-spotted Wrinkle Dorid

Names in 2 more languages

Japanese: アオスジリュウグウウミウシ
Simplified Chinese: 藍紋鏽邊海蛞蝓

Other scientific names: Nembrotha morosa, Tambja kushimotoensis

Similar species

Gabriela's Tambja
Tambja gabrielae
Olive Dorid
Tambja olivaria
Chamberlain's Nembrotha
Nembrotha chamberlaini
Crested Nembrotha
Nembrotha cristata
Trance Wrinkle Dorid
Nembrotha kubaryana
Ivory Wrinkle Dorid
Nembrotha lineolata

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).
438 open-data records from 1975 to 2026.
Species data updated October 26, 2026.