Family

Common name: Pencil Urchins

Scientific name: Cidaridae

Cidaridae, commonly known as Pencil Urchins, are a family of sea urchins characterized by their thick, blunt spines that resemble pencils. They are found in various marine environments from shallow reefs to deep-sea habitats. Pencil Urchins are known for their hardy nature and ability to adapt to different conditions, making them a suitable choice for reef aquariums. They play a beneficial role in the tank by grazing on algae, helping to keep the aquarium clean. However, their spines can be sharp and may harm more delicate tank inhabitants.

  1.  slate pencil urchin Heterocentrotus mammillatus
    Common name: Pencil Urchin
    Scientific name: Eucidaris metularia
  2. Eucidaris tribuloides, the slate pencil urchin
    Common name: slate pencil urchin
    Scientific name: Eucidaris tribuloides
  3. close up underwater photo of red slate pencil urchin
    Common name: Slate Pencil Urchin
    Scientific name: Goniocidaris tubaria
  4. Imperial Sea Urchin (Phyllacanthus imperialis), Sulawesi Indonesia
    Common name: Imperial Sea Urchin
    Scientific name: Phyllacanthus imperialis
  5. Common name: Cidaroid Sea Urchin
    Scientific name: Plococidaris verticillata
  6. Common name: Crown-spined Pencil Urchin
    Scientific name: Prionocidaris baculosa
  7. View of pencil urchin behind corals
    Common name: Pencil Sea Urchin
    Scientific name: Prionocidaris bispinosa
  8. Red lance urchin, Small lance sea urchin, Stylocidaris affinis.Sea-urchin
    Common name: red lance urchin
    Scientific name: Stylocidaris affinis