Diadema antillarum, commonly known as the long-spined sea urchin, is a popular invertebrate for marine aquariums due to its impressive spines and efficient algae grazing capabilities. This medium-sized specimen is well-suited for established reef tanks where it helps maintain algae control, contributing to a balanced ecosystem.
Care Level: Moderate. Requires stable water parameters and mature aquarium conditions.
Diet: Primarily herbivorous, feeding on various types of algae. Supplement with dried seaweed or algae wafers if natural algae is insufficient.
Compatibility: Generally reef safe and compatible with most peaceful tank inhabitants. Avoid housing with predatory fish or invertebrates that may harm the urchin.
Tank Requirements: Minimum tank size of 75 litres recommended to provide adequate space and stable conditions. Moderate water flow and lighting are suitable, mimicking natural reef environments.
Placement: Place on live rock or substrate where it can graze freely. Ensure hiding spots are available to reduce stress.
Additional Notes: Handle with care due to sharp spines. Regular monitoring of water quality and tank stability is essential for long-term health.



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