Graceful Wrinkle Dorid
Roboastra gracilis
- Usual depth2–15 m
- Water temperature20–30 °C
- Best monthsJanuary, November, and December
- How commonOccasional
Photo credit: (c) Tine Kinn Kvamme, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Roboastra gracilis is a species of sea slug, a polycerid nudibranch, a marine gastropod mollusc in the family Polyceridae.
Text from the Wikipedia article “Roboastra gracilis”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 68 records
- February: 50 records
- March: 57 records
- April: 50 records
- May: 58 records
- June: 49 records
- July: 42 records
- August: 54 records
- September: 46 records
- October: 53 records
- November: 63 records
- December: 64 records
Depth and water temperature
Depth
Mostly recorded at 2–15 m · Deepest record: 32 m
Water temperature
Recorded in surface water of 20–30 °C
Photos
(c) Jakkarin Burananit, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Kai Squires, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Debra Baker, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist 
(c) Bart, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) portioid, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
Names and classification
- English
- Graceful Wrinkle Dorid, Slender Roboastra
Names in 3 more languages
- French
- Roboastra svelte
- Japanese
- リュウグウウミウシ
- Simplified Chinese
- 細身粗海蛞蝓, 細長多角海蛞蝓
Other scientific names: Nembrotha gracilis, Nembrotha rubroocellata
Similar species
Chamberlain's NembrothaNembrotha chamberlaini
Crested NembrothaNembrotha cristata
Trance Wrinkle DoridNembrotha kubaryana
Ivory Wrinkle DoridNembrotha lineolata
Shadowy Wrinkle DoridNembrotha milleri
Blue-spotted Wrinkle DoridTambja morosa
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).
- 407 open-data records from 1877 to 2026.
- Species data updated October 26, 2026.
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