Fine-spined Heart Urchin

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 23 records
February: 25 records
March: 17 records
April: 47 records
May: 41 records
June: 38 records
July: 32 records
August: 22 records
September: 15 records
October: 20 records
November: 18 records
December: 15 records

Depth and water temperature

Depth

Mostly recorded at 3–60 m · Deepest record: 292.5 m

0–10 m: 25 records
10–20 m: 32 records
20–30 m: 30 records
30–40 m: 8 records
40–50 m: 11 records
50–60 m: 7 records
60–70 m: 5 records
70–80 m: 5 records
80–90 m: 2 records
90–100 m: 1 records
100–110 m: 0 records
110+ m: 2 records

Water temperature

Recorded in surface water of 8–30 °C

6–8 °C: 1 records
8–10 °C: 0 records
10–12 °C: 0 records
12–14 °C: 0 records
14–16 °C: 0 records
16–18 °C: 1 records
18–20 °C: 1 records
20–22 °C: 5 records
22–24 °C: 1 records
24–26 °C: 92 records
26–28 °C: 36 records
28–30 °C: 82 records

Photos

(c) Ben Costamagna, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Gregor Bailar, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Emanuele Santarelli, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Davis Damaledo, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Bao Pham, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist

Names and classification

English: Fine-spined Heart Urchin, Hearth Heart Urchin

Names in 3 more languages

French: Oursin-coeur
Japanese: オニヒメブンブク
Simplified Chinese: 扁仙壺海膽

Other scientific names: Hemipatagus mascareignarum, Hemipatagus planulatus, Lovenia quadrimaculata, Maretia fasciata, Maretia ovata, Spatangus affinis, Spatangus planulatus, Spatangus praelongus

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.
Conservation status as published by GBIF (IUCN Red List).
329 open-data records from 1816 to 2023.
Species data updated October 26, 2026.