Blue Spot Urchin

Blue Spot Urchin

Scientific Name: Astropyga radiata

Reef Safe: With caution – generally safe but may dislodge loose coral frags

Small Fish Safe: Yes

Invert Safe: Yes

Coral Safe: Yes (avoid unstable frags)

Adult Size: Up to 20 cm

Diet: Herbivore – grazes on algae and biofilm

Why We Like It:

With vibrant blue iridescent spots across a deep red body, this urchin brings movement and bold colour to the reef. Active at night and a powerful grazer, it helps with algae control but needs rockwork to be secure to avoid accidental toppling. An excellent addition to large, stable tanks with plenty of grazing area.