Spotted Unicornfish (Acanthurus spotted)

Fish in the family Acanthuridae. Moderate care. Reef Safe.

Spotted Unicornfish

Quick facts

Scientific nameAcanthurus spotted
FamilyAcanthuridae
Care levelModerate
Reef safetyReef Safe
TemperamentPeaceful
Dietherbivore
Adult size27 in
Minimum tank size180 gallons
Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Feeding schedule1-2 times daily

Appearance

The Spotted Unicornfish is a large, laterally compressed tang with a grayish-blue body covered in distinctive dark spots and blotches. It possesses a prominent horn-like rostral protuberance on the forehead (more pronounced in males), and a venomous spine at the base of the tail characteristic of the surgeon tang family.

Diet and feeding

Feed a varied herbivorous diet of high-quality marine algae sheets (nori), spirulina-based pellets, and blanched vegetables such as zucchini or spinach. Supplement occasionally with macroalgae in the tank. Feed once daily or divide into 2–3 feedings.

Difficulty and care for the Spotted Unicornfish

Moderate - Spotted Unicornfish requires standard marine aquarium maintenance and intermediate fish keeping skills.

Common health issues

Ich (Cryptocaryon), marine velvet, fin damage, parasitic infections

Origin and habitat

Indo-Pacific region from East Africa and the Red Sea eastward to Hawaii and the central Pacific. Found throughout coral reef habitats in tropical waters.

Log Spotted 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 Spotted Unicornfish alongside everything else in your reef.