Echinothrix diadema   (Linnaeus,  1758) (Sea Urchin)
Organism information awaits expert curation
Class: Echinoidea

Image copyrights: David Harasti

Size: Ambital diameter (D) = 40-83 mm.

Test (shell) globular. Ambulacra slightly raised. Ambulacral primary spines fine, needle-like, with backwardly pointed barbs near the tip. Interambulacral primary spines stout, dark with light bands, central cavity narrow. No naked greenish interambulacral areas near the apical system.

Synonym (s)
Echinus diadema Linnaeus, 1758
Echinothrix diadema Bell, 1969
Echinothrix diadema James, 1969
Astropyga spinosissima (Lamarck, 1816)
Astropyga subularis (Lamarck, 1816)
Cidaris araneiformis Leske, 1778
Cidarites spinosissima Lamarck, 1816
Cidarites subularis Lamarck, 1816
Diadema dejardinsii Michelin, 1845
Diadema spinosissimum (Lamarck, 1816)
Diadema subulare (Lamarck, 1816)
Echinothrix cincta (A. Agassiz, 1863)
Echinothrix petersii Bolsche, 1865
Echinothrix spinosissima (Lamarck, 1816)
Echinothrix spinosissimum (Lamarck, 1816)
Echinothrix subularis (Lamarck, 1816)
Echinothrix turcarum Peters, 1853
Echinus coronalis Leske, 1778
Echinus diadema Gmelin, 1788
Garelia cincta A. Agassiz, 1863
Garelia subularis (Lamarck, 1816)

Common Name (s)
Economic Importance and Threats

Habitat:  Benthic, Reef Associated, Coastal
Prey:  Hard corals


• Bay of Bengal INDIA
• Lakshadweep, Andrott INDIA (Record: 20/12/1979)
• Lakshadweep, Minicoy Lagoon INDIA (Record: 01/1990-12/1991)
• Lakshadweep, Minicoy INDIA
• Lakshadweep, Chettalatt INDIA
• Lakshadweep, Kadamatt INDIA
• Lakshadweep, Amini INDIA
• Lakshadweep, Kavaratti INDIA

Literature Source(s)
  • Tikadar, BK; Daniel, A and Subbarao, NV (1986) Sea shore animals of Andaman and Nicobar Islands The Director, ZSI, Kolkatta 188 Available at - ZSI, Pune
  • (2001) Invertebrate zoology collections Available at -
  • Russell, FE and Nagabhushanam, R (1996) Minor phyla in the venomous and poisonous marine invertebrates of the Indian Ocean 1-271 Available at - NIO, Goa
  • Sastry, DRK (2002) Echinodermata associated with coral reefs of Andaman and Nicobar Islands Zoological Survey of India ZSI 100(3-4) 21-60 Available at - ZSI, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Sastry, DRK (1991) Echinodermata: Asteroidea, Ophiuroidea and Echinoidea State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 363-397 Available at - NIO, Goa
  • Scuba equipment USA - Marine species gallery Available at -
  • Sealifebase Available at -
  • Navas, KA and Mathew, KJ (1995) Present status of coral erosion in Lakshadweep with special reference to Minicoy Mariculture research under the postgraduate programme in mariculture part 6 CMFRI Special Publication cmfri 61 1-5 Available at -
  • James, PSBR ; Thomas, PA ; Pillai, CSG and Achari Kumaraswamy, GP (1969) ´╗┐Catalogue of types and of sponges, corals, polychaetes, crabs and echinoderms in the reference collections of the Central Marine Fisheries Research Institute Bulletin of Central Marine Research Institute CMFRI, Cochin 7 1-66 Available at -
  • Sastry, DRK (2007) Echinodermata of India : An annotated list Records of Zoological Survey of India Occassional paper No. 271 ZSI, Kolkata 1-387 Available at -
  • James, DB (1989) Echinoderms of Lakshadweep and their zoogeography Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 97-144 Available at -

Page last updated on:2011-04-25

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