Long-Sleeved Chestnut

Turkish Name: Uzun Dikenli Deniz Kestanesi / Long Spine Urchin
Scientific Name: Diadema setosum
Family: Diadematidae
Origin: Indo-Pacific Ocean
Care Difficulty: Medium – Difficult
Temperament: Peaceful
Diet: Herbivore (algae consumer)
Minimum Aquarium Size: 200 liters
Maximum Size: 30–40 cm (appears much wider with spine spread)
Temperature: 24–27°C
Salinity: 1.023–1.025 SG
pH: 8.1–8.4
Reef Compatibility: Conditionally compatible

Diadema setosum is a powerful algae-consuming sea urchin known for its very long, thin, and fragile spines. It is commonly found in coral reefs in nature and contributes to the ecosystem by cleaning algae from rock surfaces.

It is completely peaceful