Bluelined Surgeonfish (Acanthurus nubilus)

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

Bluelined Surgeonfish

Quick facts

Scientific nameAcanthurus nubilus
FamilyAcanthuridae
Care levelModerate
Reef safetyReef Safe
TemperamentSemi Aggressive
Dietherbivore
Adult size9 in
Minimum tank size75 gallons
Water parametersTemperature: 72-80°F pH: 8.1-8.3 Salinity: 1.02-1.025
Feeding schedule1-2 times daily

Appearance

The Bluelined Surgeonfish is a compact, laterally flattened surgeonfish with a dark gray to blue-gray body marked by distinctive bright blue horizontal lines running along its head and gill covers. The fish has the characteristic surgeonfish body shape with a small mouth and venomous spines at the base of the tail. Adults typically reach 8–9 inches.

Diet and feeding

In captivity, offer high-quality marine herbivore pellets, nori sheets, and blanched spinach daily. Supplement with spirulina-based foods and occasional frozen green foods to maintain health and coloration.

Difficulty and care for the Bluelined Surgeonfish

The Bluelined Surgeonfish is moderately difficult, requiring stable water conditions, adequate space to forage, and a diet rich in marine vegetation. It is less aggressive than many tangs but demands meticulous attention to water quality.

Common health issues

Marine ich, Fin rot, Swim bladder disorder, Hole-in-the-head disease, Velvet disease

Origin and habitat

Indo-Pacific region, including the Hawaiian Islands, from the Great Barrier Reef to the Red Sea and eastward to Hawaii.

Log Bluelined Surgeonfish 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 Bluelined Surgeonfish alongside everything else in your reef.