Pencil Urchin

(Eucidaris tribuloides)

Eucidaris urchins are found in a variety of marine habitats, ranging from shallow coastal areas to deeper oceanic environments. They often inhabit rocky or coral reef substrates and are typically found in areas with crevices and hiding spots. Eucidaris urchins are primarily herbivorous, feeding on algae and other plant material. Urchins may disturb substrate and other tank inhabitants. It's essential to avoid using copper-based treatments in a tank with sea urchins, as it can harm them. Always follow the recommended guidelines for medication use in marine aquariums.

Eucidaris tribuloides Urchins are also sometimes known as Pencil or Slate Pencil Urchins. Eucidaris tribuloides Urchins are commonly collected for the aquarium trade. They are typically dark gray, brown or black. Pencil Urchins can grow up to 4".

Water conditions: Salinity 1.023 - 1.025 Temp (F) 72 - 78, pH 8.1 - 8.4, Hardness 8 - 12 dKH

  • Care: CareModerateModerate
  • Behavior: BehaviorSocialSocial
  • Diet: DietFrozen FoodFrozen Food DietHerbivoreHerbivore
  • Habitat: HabitatReefReef
  • Light: LightNocturnalNocturnal