Order

Common name: Sea urchins

Scientific name: Echinothurioida

Echinothurioida is an order of sea urchins known for their deep-sea habitats and long spines. Members of this order, such as the genus Asthenosoma, are often characterized by their flexible spines and ability to inflate themselves as a defense mechanism. They are not commonly kept in home aquariums due to their specialized care requirements and potential to harm other tank inhabitants with their venomous spines. However, their unique appearance and behaviors can make them a subject of interest for advanced aquarists with the capability to provide for their needs.

  1. Magnificent fire urchin (Asthenosoma ijimai) near Anilao, Batangas, Luzon, Philippines.  Underwater photography and travel.
    Common name: Fire Urchin
    Scientific name: Asthenosoma ijimai
  2. Coleman Shrimp, Periclimenes colemani, Sea Urchin, Variable Fire Urchin, Asthenosoma varium, Coral Reef, Lembeh, North Sulawesi, Indonesia, Asia
    Common name: variable fire urchin
    Scientific name: Asthenosoma varium