Where Blue-black sea urchin has been recorded
GBIF occurrence records for Echinothrix diadema, mapped and tabulated by country.
3,302 georeferenced occurrence records with coordinates are published for Echinothrix diadema through GBIF, from 53 countries or marine areas. This page maps those records and lists where they come from. Occurrence records reflect where people have looked as well as where the species lives, so well-surveyed coastlines are over-represented.
- Georeferenced records
- 3,302
- Countries / areas
- 53
- Mapped locations
- 192
- Records sampled for the map
- 3,000
- Inland records omitted
- 20
- Gbif taxonkey
- 5188164
Countries and areas with the most records (GBIF)
Cook Islands — 459 records; United States of America — 376 records; French Polynesia — 372 records; Kenya — 276 records; Wallis and Futuna — 189 records; Nauru — 182 records; Indonesia — 158 records; Solomon Islands — 150 records; Kiribati — 135 records; New Caledonia — 130 records; Papua New Guinea — 116 records; Marshall Islands — 94 records; Samoa — 74 records; Micronesia (Federated States of) — 72 records; Australia — 57 records.
Source: GBIF Occurrence Search (taxonKey 5188164) — https://www.gbif.org/occurrence/search?taxon_key=5188164&has_coordinate=true (records CC0 / CC BY). Accessed 2026-09-23.
Marine regions with a WoRMS distribution record
West Indian Ocean; Mascarene Basin; Eastern Africa & Madagascar; Red Sea; Kenyan Exclusive Economic Zone; Somali Exclusive Economic Zone; Seychellois Exclusive Economic Zone; Chagos; Madagascar; Aldabra; Marsa Shagra; South Andaman Islands; Laamu Atoll; Philippine Exclusive Economic Zone; South African Exclusive Economic Zone; Seychelles; Mauritian Exclusive Economic Zone.
Source: WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=213378 (CC BY 4.0). Accessed 2026-09-23.
How to read this map
The map plots a sample of 3,000 of the 3,302 records, deduplicated to a half-degree grid, so dense areas do not merge into one blob. The sample covers 48 of the 53 countries or areas with records; the areas absent from the sample hold 11 records in total (Mauritius, Cocos (Keeling) Islands, France, Antarctica, Sudan).
20 records plotting inland were omitted: for a marine species those are almost always the holding institution's coordinates rather than a collection site.
Records show where the species has been observed and reported, not a modelled range.
Source: GBIF Occurrence Search (taxonKey 5188164) — https://www.gbif.org/occurrence/search?taxon_key=5188164&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=213378 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.
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