Idaliadoris depressa

About this species

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

Text from the Wikipedia article “Idaliadoris depressa”, 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: 9 records
February: 11 records
March: 19 records
April: 15 records
May: 17 records
June: 20 records
July: 18 records
August: 21 records
September: 10 records
October: 10 records
November: 0 records
December: 1 records

Depth and water temperature

Depth

Mostly recorded at 0–64 m · Deepest record: 73 m

0–10 m: 11 records
10–20 m: 3 records
20–30 m: 7 records
30–40 m: 1 records
40–50 m: 0 records
50–60 m: 2 records
60–70 m: 2 records
70–80 m: 2 records

Water temperature

Recorded in surface water of 9–25 °C

8–10 °C: 8 records
10–12 °C: 27 records
12–14 °C: 23 records
14–16 °C: 0 records
16–18 °C: 0 records
18–20 °C: 4 records
20–22 °C: 0 records
22–24 °C: 0 records
24–26 °C: 1 records

Photos

(c) Heine Jensen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Bernard Picton, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Viktor V. Grøtan, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Steven Farquhar, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Bernard Picton, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

Names in 2 more languages

French: Doris à crochets déprimée
Japanese: ヒララメリウミウシ

Other scientific names: Atalodoris depressa, Doris depressa, Knoutsodonta depressa, Onchidoris depressa

Similar species

Idaliadoris maugeansis
Rough doris
Onchidoris muricata

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).
145 open-data records from 1936 to 2023.
Species data updated November 3, 2026.