Saltwater InvertebrateIn stock
Care levelEasy
CompatibilitySemi-aggressive
ARIUM FAUNA & FLORA+50 points
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Saltwater Invertebrate
Pencil Urchin
Care: EasySemi-aggressive
Back soon. We get new shipments regularly. Arium EVOLVE members can get an email the moment it's back, or call (786) 642-3001 to reserve one.
- Earn 50 points toward your next level with Arium EVOLVE.
- Free pickup in Davie. Choose pickup at checkout. Usually ready in 24 hours, Wed–Sun 12–7.
- Ships Mon–Wed by UPS or FedEx. Overnight recommended for live animals. Florida: FedEx Ground available.
- Live arrival guarantee. Arrived DOA? Send a photo within 24 hours and we'll replace or refund it.
- Questions? Call 786-642-3001. We know every animal we sell.
About this saltwater invertebrate
The slate pencil urchin (Eucidaris tribuloides) has thick, blunt spines and grazes algae across the rockwork. Colors and size vary.
Pencil Urchin Care Guide
- Tank size: 30 gallons or more
- Adult size: about 3 inches (8 cm)
- Temperature: 72–78°F (22–26°C)
- pH: 8.1–8.4
- Water: SG 1.023–1.025, no copper
- Diet: Algae, nori and sinking pellets
- Temperament: Peaceful with fish
- Reef safe: With caution: may graze coralline algae and knock over or nibble corals
Photo: Nhobgood (talk) Nick Hobgood, CC BY-SA 3.0, via Wikimedia Commons. Representative photo of the species; individual animals vary.
Pairs well with
