Pentamerous sea cucumber

About this species

Eupentacta quinquesemita is a species of sea cucumber, a marine invertebrate with an elongated body, a leathery skin and tentacles surrounding the mouth. It is commonly known as the stiff-footed sea cucumber or white sea cucumber, and occurs on rocky coasts in the northeastern Pacific Ocean.

Text from the Wikipedia article “Eupentacta quinquesemita”, 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: 90 records
February: 126 records
March: 136 records
April: 180 records
May: 205 records
June: 267 records
July: 232 records
August: 221 records
September: 109 records
October: 222 records
November: 103 records
December: 85 records

Depth and water temperature

Depth

Mostly recorded at 14–31 m · Deepest record: 435.5 m

0–10 m: 37 records
10–20 m: 300 records
20–30 m: 461 records
30–40 m: 93 records
40–50 m: 9 records
50–60 m: 1 records
60–70 m: 1 records
70–80 m: 0 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 16 records

Water temperature

Recorded in surface water of 2–20 °C

0–2 °C: 1 records
2–4 °C: 0 records
4–6 °C: 1 records
6–8 °C: 2 records
8–10 °C: 116 records
10–12 °C: 416 records
12–14 °C: 8 records
14–16 °C: 1 records
16–18 °C: 2 records
18–20 °C: 26 records

Photos

(c) Ken-ichi Ueda, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist
(c) rlacroix, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Rajan Rao, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Marilynne Box, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Pentamerous sea cucumber, pentamerous sea cucumber, Stiff-footed sea cucumber, White Sea Cucumber

Names in 3 more languages

Spanish: Pepino de mar Cinco Senderos
French: holothurie à sillons
Japanese: イシコ

Other scientific names: Cucumaria chronhjelmi, Cucumaria quinquesemita, Eupentacta chronhjelmi

Similar species

Ohshimella ehrenbergii
African Sea Cucumber
Afrocucumis africana
Cladolabes aciculus
Cladolabes perspicillum
Cladolabes schmeltzii
Havelockia fastigata

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).
1,429 open-data records from 1896 to 2024.
Species data updated November 2, 2026.