Black-Spot Surgeonfish (Acanthurus bariene)

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

Black-Spot Surgeonfish

Quick facts

Scientific nameAcanthurus bariene
FamilyAcanthuridae
Also known asBlack-Spot Surgeonfish
Care levelModerate
Reef safetyReef Safe
TemperamentSemi Aggressive
Dietherbivore
Adult size11 in
Minimum tank size125 gallons
Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Feeding schedule2-3 times daily

Appearance

The Black-Spot Surgeonfish has a compressed oval body with a dark gray to black coloration, becoming lighter on the underside. It is distinguished by a prominent black spot ringed with a pale circle located on the caudal peduncle (base of the tail), which gives the species its common name. It has the characteristic venomous spine of the Acanthuridae family at the tail base.

Diet and feeding

In the reef aquarium, feed high-quality dried macroalgae, nori, and specially formulated herbivore pellets. Supplement with occasional frozen herbivore preparations. A varied diet supports long-term health and coloration.

Difficulty and care for the Black-Spot Surgeonfish

Moderate difficulty. While hardy once established, this surgeonfish demands excellent water quality, ample space for swimming, and consistent vegetable-based nutrition. It can be aggressive toward other tangs and surgeonfish.

Common health issues

Marine Ich, Fin Rot, Swim Bladder Disorder, Bacterial Infections, Fungal Diseases

Origin and habitat

Indo-Pacific from the Red Sea and East Africa to Hawaii and the central Pacific. Found in coral reef environments throughout this range.

Log Black-Spot 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 Black-Spot Surgeonfish alongside everything else in your reef.