Species Description…

Scientific Name: Zanclus cornutus

Common Name: Moorish Idol

Species Group: Moorish Idol

Habitat: Reef Safe with Caution

Care Level: Advanced

Temperament: Peaceful

Diet Type: Omnivore

Role in Aquarium: Showpiece Fish

Max Fish Length: 9 (inches)

Min Aquarium Size: 125 (gallons)

Native Range: Indo-Pacific

Zanclus Cornutus - The Moorish Idol

Zanclus Cornutus (The Moorish Idol)

Widely distributed across tropical regions of the Indo-Pacific, from Hawaii to East Africa and the Red Sea.
Instantly recognizable by its distinctive body shape, elongated dorsal fin, and striking black, white, and yellow coloration.
Notoriously challenging to maintain in captivity due to its specialized diet and sensitivity to water conditions.
A graceful and elegant swimmer, highly sought after by experienced marine hobbyists.
Best suited for advanced aquarists with large, well-established aquariums providing ample swimming space.

Primarily omnivorous, feeding on sponges, algae, small crustaceans, and tunicates in the wild.
Extremely selective feeders, often difficult to transition onto prepared aquarium foods.
Thrives on a varied diet consisting of live sponges, fresh and frozen marine algae, mysis shrimp, and vitamin-enriched preparations.
Requires multiple feedings daily to ensure nutritional needs are met, given its active nature and high metabolic demands.
Ensuring a constant supply of natural foods greatly increases the likelihood of long-term survival and overall vitality.

Commonly found along reef slopes and outer reefs of the Indo-Pacific, preferring areas with strong currents and abundant coral growth.
Frequently observed swimming in pairs or small groups, exploring reef crevices and coral structures.
Aquarium setups should mimic its natural environment with live rock formations, open swimming areas, and strong water flow.
High-quality filtration, pristine water conditions, and stable parameters are critical to its survival.
Providing natural coral growth and sponges enhances survival rates and replicates its natural habitat.

Optimal water temperature: 74-80°F (23-27°C), essential for metabolic efficiency and stress reduction.
Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
Regular water testing, frequent water changes, and excellent filtration are crucial to maintaining pristine water quality.
Not entirely reef-safe, known to nip at coral polyps and sponges, especially if its diet is not adequately provided.
Providing ideal conditions with minimal fluctuations in water parameters is crucial for successful maintenance.

Generally peaceful but should be housed with non-aggressive and similarly delicate species to avoid stress.
Compatible with tangs, butterflyfish, and other peaceful reef-associated fish of similar size and temperament.
Should not be housed with aggressive fish or highly territorial species that may bully or stress the Moorish Idol.
Thrives best in peaceful community aquariums with adequate space and minimal competition for food.
Providing numerous hiding spots and a spacious swimming area ensures a stress-free environment.

Known for its graceful swimming style, continuously patrolling the aquarium and exploring coral structures.
Frequently observed nibbling on live rock and coral surfaces searching for edible organisms.
Initially shy, but may become more confident and interactive over time in a stable aquarium setting.
Providing structured rockwork and natural food sources encourages natural behaviors and reduces stress.
Over time, it may recognize and respond positively to the caretaker, especially during feeding.