Elongate Unicornfish (Naso lopezi)

Fish in the family Acanthuridae. Expert care. Not Reef Safe.

Elongate Unicornfish

Quick facts

Scientific nameNaso lopezi
FamilyAcanthuridae
Care levelExpert
Reef safetyNot Reef Safe
TemperamentSemi Aggressive
Dietherbivore
Adult size24 in
Minimum tank size250 gallons
Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Feeding scheduleFeed 2-3 times daily

Appearance

The Elongate Unicornfish features an elongated, laterally compressed body with a steep forehead that develops a frontal horn or protuberance in males. Coloration is blue-gray to brown dorsally with a lighter, silvery ventral surface; fins are yellow to orange, particularly the tail and dorsal fin.

Diet and feeding

Feed high-quality herbivorous foods including macroalgae, spirulina-based pellets, and dried seaweed sheets. Supplement with vegetable matter such as blanched spinach or nori. Provide frequent small meals rather than large amounts to mimic natural grazing behavior.

Difficulty and care for the Elongate Unicornfish

Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.

Common health issues

Marine Ich, Fin Rot, Swim Bladder Disorder, Hole-in-the-Head, Columnaris Disease

Origin and habitat

Indo-Pacific region from the Indian Ocean to the central Pacific, including areas from East Africa to the Philippines and westward to Indonesia.

Log Elongate 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 Elongate Unicornfish alongside everything else in your reef.