Ascidian

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 23 records
February: 5 records
March: 9 records
April: 6 records
May: 5 records
June: 4 records
July: 3 records
August: 16 records
September: 18 records
October: 12 records
November: 12 records
December: 9 records

Depth and water temperature

Depth

Mostly recorded at 1–40 m · Deepest record: 672.5 m

0–10 m: 13 records
10–20 m: 3 records
20–30 m: 1 records
30–40 m: 5 records
40–50 m: 1 records
50–60 m: 1 records
60–70 m: 0 records
70–80 m: 0 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 1 records

Water temperature

Recorded in surface water of 2–30 °C

0–2 °C: 1 records
2–4 °C: 0 records
4–6 °C: 0 records
6–8 °C: 0 records
8–10 °C: 0 records
10–12 °C: 0 records
12–14 °C: 1 records
14–16 °C: 3 records
16–18 °C: 0 records
18–20 °C: 1 records
20–22 °C: 1 records
22–24 °C: 3 records
24–26 °C: 14 records
26–28 °C: 4 records
28–30 °C: 7 records

Photos

(c) Rafael Rosa, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Shaunak Modi, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Srichakra Pranav Tamarapalli, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Nicola Crockford, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Vincent Mia Edie Verheyen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) João D'Andretta, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Rafael Rosa, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist

Names and classification

English: Ascidian

Other scientific names: Didemnum dorotubu, Didemnum psamathodes, Didemnum psammathodes, Didemnum psammatode, Didemnum siphoniatum, Didemnum skeati, Didemnum venosum, Hypurgon fuscum, Hypurgon skeati, Leptoclinum ianthimum, Leptoclinum ianthinum, Leptoclinum psamathodes, Leptoclinum psammathodes, Leptoclinum psammatodes, Leptoclinum siphoniatum

Similar species

Northern white crust
Didemnum albidum
Green Barrel Sea Squirt
Didemnum molle
Compound sea squirt
Didemnum vexillum
Didemnum jucundum
Moseley's Ascidian
Didemnum moseleyi
Colonial tunicate
Didemnum perlucidum

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.
Conservation status as published by GBIF (IUCN Red List).
158 open-data records from 1934 to 2005.
Species data updated November 2, 2026.