Whitemargin Unicornfish (Naso annulatus)
Fish in the family Acanthuridae. Expert care. Reef Safe with Caution.
Quick facts
Appearance
A large, robust unicornfish (tang) with a grayish to silvery body and distinctive white-bordered pectoral fins (giving it the "whitemargin" common name). Adults develop a prominent bony frontal protuberance and elongated snout typical of Naso species.
Diet and feeding
In captivity, feed a varied diet of high-quality marine flake, pellets, and frozen foods (mysis shrimp, brine shrimp) supplemented with vegetable matter, including nori and spirulina. They graze on algae in the aquarium and benefit from regular vegetable offerings.
Difficulty and care for the Whitemargin Unicornfish
Moderate - Whitemargin Unicornfish requires standard marine aquarium maintenance and intermediate fish keeping skills.
Common health issues
Marine ich, Fin rot, Swim bladder disorder, Hole-in-the-head disease, Velvet disease
Origin and habitat
Indo-Pacific from the Red Sea and East Africa to Hawaii and French Polynesia, typically found on outer reef slopes and in areas with moderate to strong currents.
Log Whitemargin Unicornfish in your reef tank
Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Whitemargin Unicornfish alongside everything else in your reef.
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