Longspine Urchin – Diadema setosum

Introduction

The Longspine Urchin, Diadema setosum, is a striking marine invertebrate known for its long, needle-like spines and vibrant blue iridescent dots. This species adds visual interest and helps control algae in aquariums. However, its delicate care requirements and venomous spines make it suitable for experienced aquarists.

Care Level:
Intermediate

Diet:
Omnivore, primarily feeds on algae

Max Size:
Up to 10 inches

Temperament:
Semi-aggressive; can be territorial

Family:
Diadematidae