Rough doris

About this species

Onchidoris muricata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.

Text from the Wikipedia article “Onchidoris muricata”, 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: 173 records
February: 196 records
March: 257 records
April: 212 records
May: 220 records
June: 291 records
July: 310 records
August: 180 records
September: 132 records
October: 136 records
November: 111 records
December: 123 records

Depth and water temperature

Depth

Mostly recorded at 0–42 m · Deepest record: 105 m

0–10 m: 212 records
10–20 m: 116 records
20–30 m: 169 records
30–40 m: 39 records
40–50 m: 30 records
50–60 m: 27 records
60–70 m: 9 records
70–80 m: 4 records
80–90 m: 2 records
90–100 m: 1 records
100–110 m: 1 records

Water temperature

Recorded in surface water of 6–22 °C

4–6 °C: 6 records
6–8 °C: 15 records
8–10 °C: 96 records
10–12 °C: 296 records
12–14 °C: 104 records
14–16 °C: 0 records
16–18 °C: 5 records
18–20 °C: 0 records
20–22 °C: 2 records

Photos

(c) Heine Jensen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Trevor Van Loon, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Tine Kinn Kvamme, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Klaus Kevin Kristensen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Heine Jensen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Tine Kinn Kvamme, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Deep Marine Scenes, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Rough doris, Fuzzy Onchidoris, rough doris

Names in 2 more languages

German: Blassgraue Sternschnecke, raue Sternschnecke, Weiße Doride
Japanese: シロトゲウミウシ

Other scientific names: Doris aspera, Doris diaphana, Doris muricata, Doris ulidiana, Lamellidoris aspera, Lamellidoris diaphana, Lamellidoris muricata, Onchidoris aspera

Similar species

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).
2,125 open-data records from 1868 to 2026.
Species data updated November 5, 2026.