Order

Common name: Sea Urchins

Scientific name: Diadematoida

Diadematoida is an order of sea urchins known for their long, thin spines that can be quite sharp and venomous in some species. Members of this order, such as the genus Diadema, are important for their role in controlling algal growth on reefs. They are generally nocturnal and can be sensitive to water quality, requiring stable conditions. Hobbyists should handle them with care due to their spines and consider their potential to reshape the reef scape by grazing on algae.

  1. Magnificent Urchin Astropyga magnifica
    Common name: Pale spine fire urchin
    Scientific name: Astropyga magnifica
  2. Venomous sea urchin, Astropyga radiata, Bali Indonesia.
    Common name: Blue-spotted Urchin
    Scientific name: Astropyga radiata
  3. Hatpin sea urchin - Centrostephanus longispinus
    Common name: long-spined urchin
    Scientific name: Centrostephanus longispinus
  4. Large almost black Rodgers sea urchin Centrostephanus rodgersii hiding in rock crevice covered with colourful encrusting invertebrate life forms.
    Common name: Long-spined Sea Urchin
    Scientific name: Centrostephanus rodgersii
  5. Underwater two long spined sea urchins, Diadema antillarum, on the seabed in the Caribbean sea
    Common name: long-spined sea urchin
    Scientific name: Diadema antillarum
  6. Diadema Savignyi - Diadematidae - Long-spined sea urchin - Black longspine urchin  - Banded diadem
    Common name: Sea urchin
    Scientific name: Diadema savignyi
  7. Sea Urchin Or Urchin Or Sea Hedgehog Diadema Setosum Swimming In
    Common name: black longspine urchin
    Scientific name: Diadema setosum
  8. Bleistift-Diademseeigel  Echinothrix calamaris
    Common name: banded sea urchin
    Scientific name: Echinothrix calamaris
  9. Sea Urchin at Seabed Diadema Setosum
    Common name: Diadema urchin
    Scientific name: Echinothrix diadema