Pink / Red Pincushion Urchin - Lytechinus variegatus
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The Pink / Red Pincushion Urchin (Lytechinus variegatus) is a colorful and active marine urchin, valued for its striking appearance and algae-grazing habits. This peaceful invertebrate adds movement and natural cleaning behavior to reef aquariums.
Common Name: Pink / Red Pincushion Urchin
Scientific Name: Lytechinus variegatus
Family: Toxopneustidae
Size: Up to 2 inches (5 cm)
Temperament: Peaceful
Difficulty: Easy
Reef Safe: Yes
Native Region: Found throughout the Indo-Pacific and Western Atlantic, commonly inhabiting sandy and rocky reef areas with abundant algae and detritus.
Tank Size: Minimum of 10 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Live rock and coral rubble; provide open areas for grazing and microalgae access.
• Algae Control: Grazes on hair algae, film algae, and detritus, helping maintain a clean tank environment.
• Behavior: Peaceful and mobile; often seen moving across rockwork and substrate while feeding.
• Diet: Herbivorous—supplement with dried seaweed or algae wafers if natural algae is limited.
• Tankmates: Compatible with most reef fish and invertebrates; avoid predatory species that may harm the urchin.