Rock Urchins (S)

• Care levelEasy
• Reef safeYes
• TemperamentPeacefulPeaceful; bulldozes loose frags and small rocks
• Temperature72–78 °F
• Salinity1.023–1.025 SG
• pH8.1–8.4
• Min tank40 gallons
• Favorite foods
  1. Film algae / microalgae
  2. Nori / dried seaweed
  3. Algae wafers / spirulina
• Max size3 in (7.6 cm)

In plain words: The rock urchin is a small sea urchin from Florida and the Caribbean. Its body is shaped like a flat egg, not a ball. It is covered in short, thick, pointy spines. Most are dark red or brown, but some are almost black.

Full species guide → See its family tree