About
The Unicorn Leatherjacket (Aluterus monoceros) is a distinctive species of filefish known for its horn-like projection on the forehead.Scientific Name
Aluterus monocerosHabitat
Found in tropical and subtropical waters of the Indo-Pacific. Inhabits coastal reefs, lagoons, and rocky or sandy bottoms.Conservation
Not endangered. However, susceptible to overfishing and habitat loss due to coral reef degradation.Lifespan
Typically lives up to 10–12 years in the wild.Fun Fact
The name "Unicorn" comes from the single protruding spine between the eyes that resembles a horn.Diet
Omnivorous – feeds on algae, small invertebrates, sponges, and detritus.Average Size
Can grow up to 75 cm (30 inches) in length.Location / Placement info
Displayed in the Coastal Reef Exhibit, near the Ocean-View TunnelFAQ
What is the lifespan of the Unicorn Leatherjacket?
They can live up to 10–12 years in large, well-maintained marine aquariums.
What do they eat?
They are omnivorous, feeding on algae, small invertebrates, sponges, and marine preparations.
Are Unicorn Leatherjackets aggressive?
No, they are generally peaceful, but due to their size, they should be housed with similarly sized fish.
What is the ideal tank size?
A minimum of 250 gallons is needed due to their adult size and swimming needs.
Do they need a specific environment?
Yes, they prefer open swimming space, live rock for grazing, and stable saltwater parameters.
How big do Unicorn Leatherjackets grow?
They can reach up to 30 inches (75 cm) in the wild; in captivity, usually 18–24 inches (45–60 cm).
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