Pencil urchin

Pencil Urchin: Unique Algae Control with Distinctive Character

Pencil Urchins (Eucidaris tribuloides) are fascinating and distinctive invertebrates known for their thick, blunt spines that resemble pencils. These hardy urchins are effective algae grazers that add both functional cleanup capabilities and unique visual interest to your reef aquarium, making them a conversation piece as well as a working member of your cleanup crew.

Why Pencil Urchins?

• Effective algae control on rocks, glass, and substrate
• Distinctive thick, blunt spines create unique appearance
• Generally reef-safe with proper feeding and coral placement
• Hardy and adaptable to a range of aquarium conditions
• Peaceful temperament and compatible with most tank inhabitants
• Often decorates itself with shells and debris - entertaining behavior

Care Requirements:

• Temperature: 72-78°F
• Salinity: 1.023-1.025
• pH: 8.1-8.4
• Stable alkalinity and adequate calcium for spine and test (shell) health
• Ensure sufficient algae or supplement with nori if algae is limited
• Moderate water flow

Important Notes: While generally reef-safe, Pencil Urchins may occasionally knock over small coral frags or decorations while grazing due to their larger size and weight. Secure coral placement is recommended. Hungry urchins may nibble on coralline algae if other food sources are depleted. Urchins are sensitive to sudden salinity changes and require careful acclimation.

Tank Size: Minimum 30 gallons.

Each Pencil Urchin is carefully quarantined and inspected to ensure you receive a healthy, active specimen ready to provide effective algae control and unique character to your reef aquarium.