The Zanclus cornutus, or Moorish Idol, is renowned for its distinctive black, white, and yellow banding and elegant dorsal fin. This small-sized fish is a challenging but rewarding addition to a mature marine aquarium.
Care Level: Advanced. Moorish Idols are sensitive and require stable water conditions and a varied diet.
Temperament: Generally peaceful but can be shy. Best kept singly or in pairs to avoid territorial disputes.
Diet: Omnivorous. Requires a varied diet including sponges, algae, and specialised prepared foods. Supplement with live or frozen meaty foods to ensure nutritional balance.
Minimum Tank Size: At least 180 litres (50 gallons) to provide ample swimming space and maintain water quality.
Reef Safety: With Caution. May nip at certain corals and invertebrates; monitor behaviour closely in reef setups.
Lighting Requirements: Moderate lighting to replicate natural reef environments.
Water Flow: Moderate to strong flow preferred to mimic natural habitats and support health.
Placement: Provide plenty of live rock for grazing and hiding spots to reduce stress.
Origin: Indo-Pacific region.
Maximum Size: Up to 23 cm (9 inches) in captivity.
Due to their specialised care requirements, Zanclus cornutus are recommended for experienced marine aquarists with established systems. Regular water testing and careful dietary management are essential for long-term health.
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