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Pencil urchin — AI illustration, not an ID reference

Pencil urchin

Eucidaris tribuloides

InvertebratesSaltwater

Care level: Easy
Temperament: Peaceful
Reef safe: With caution
Minimum tank: 200 L
Maximum size: 10 cm
Temperature: 24–27 °C
pH: 8–8.4
Diet: Omnivore

Good to know

Active at night

Related species

Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.

In the BlubHub app you link your inhabitants to this database and see the care info next to your own water parameters.