The Moorish Idol is a visually stunning reef fish known for its long dorsal fin and striking black, white, and yellow bands. Native to Indo-Pacific reefs, it is admired in aquariums but is difficult to care for due to diet sensitivity.
Scientific Name
Zanclus cornutus
Habitat
Found in shallow tropical and subtropical reefs and lagoons at depths of 3–180 meters across the Indo-Pacific.
Conservation
Not currently endangered, but reef habitat degradation can affect their population.
Lifespan
Can live up to 4–7 years in captivity with proper care; often longer in the wild.
Fun Fact
The Moorish Idol’s long dorsal fin spine, called a "philomantis extension", shortens with age.
Diet
Omnivorous – feeds mainly on sponges, algae, coral polyps, tunicates, and benthic invertebrates.
Average Size
Grows up to 23 cm (9 inches).
Location / Placement info
Displayed in the Coastal Reef Exhibit, near the Ocean-View Tunnel
FAQ
What is the lifespan of the Moorish Idol?
In the wild, they can live over 4–6 years, but in captivity, their lifespan is often shorter due to feeding challenges.
What do Moorish Idols eat?
They are omnivores that eat sponges, coral polyps, algae, and benthic invertebrates.
Are Moorish Idols aggressive?
No, they are peaceful, but may become territorial with similar-shaped species.
What is the ideal tank size for Moorish Idols?
A minimum of 150–180 gallons with plenty of swimming space and live rock is required.
Do Moorish Idols need a reef environment to survive?
Yes, they thrive in reef-like settings, but are not reef-safe due to their coral-eating behavior.
How big do Moorish Idols grow?
They can grow up to 7–9 inches (18–23 cm) in length, excluding the filament.
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