Diadema setosum is a large, long-spined sea urchin prized in the marine aquarium hobby for its elegant appearance and effective algae control. This species features slender, needle-like spines that can reach considerable lengths, making it a visually striking addition to reef tanks.
Care Level: Moderate. Diadema setosum requires stable water parameters and a mature aquarium environment to thrive.
Diet: Primarily herbivorous, feeding on algae and biofilm. Supplement with dried seaweed or specialised urchin foods if natural algae is insufficient.
Compatibility: Generally peaceful and reef safe, but caution is advised around slow-moving or delicate invertebrates due to its long spines.
Tank Requirements: A minimum tank size of 75 litres is recommended to provide ample space for movement and grazing. Ensure good water flow and stable water quality.
Placement: Place on live rock or reef substrate where it can graze naturally. Avoid placing near corals or invertebrates that may be damaged by its spines.
Special Notes: Handle with care due to sharp spines that can cause injury. Provide hiding spots to reduce stress and allow natural behaviour.
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