Common name: Moorish idol

General information

The Moorish Idol, Zanclus cornutus, is a distinct and highly recognizable species due to its bold black, white, and yellow banded coloration and long, trailing dorsal fin. It is the sole member of the family Zanclidae and is often considered one of the most beautiful fish in the ocean. In the wild, Moorish Idols are often seen in pairs or small groups, grazing on sponges and other invertebrates.

Care

Moorish Idols are known to be challenging to keep in home aquariums due to their specific dietary and environmental needs. They require a varied diet of marine sponges, tunicates, and other benthic invertebrates to thrive. A large, mature aquarium with plenty of live rock for grazing and open swimming space is essential. Due to their delicate nature, they are recommended for experienced aquarists.

Reproduction

In the wild, Moorish Idols form pairs during the breeding season. They are pelagic spawners, releasing eggs and sperm into the water column where fertilization occurs. The larvae are planktonic, drifting in the open ocean before settling down to the reef. Captive breeding is rare and poses significant challenges.

Habitat

Moorish Idols are widespread throughout the tropical and subtropical reefs of the Indo-Pacific region. They are commonly found in clear lagoons and on outer reef slopes, often associating with Acropora coral formations. They can be found at various depths, typically from the surface down to about 180 meters.