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Black-Spot Surgeonfish (Acanthurus bariene)

Find Black-Spot Surgeonfish across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Black-Spot Surgeonfish
Photo: Ben Costamagna · CC BY 4.0
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Where to buy Black-Spot Surgeonfish

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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  • Petco

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About Black-Spot Surgeonfish

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.

Key facts

Min tank size
125 gallons
Difficulty Level
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.
Care Level
Moderate
Family
Acanthuridae
Diet Details
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.
Origin
Indo-Pacific from the Red Sea and East Africa to Hawaii and the central Pacific. Found in coral reef environments throughout this range.
Reef safety
Reef Safe
Common Health Issues
Marine Ich, Fin Rot, Swim Bladder Disorder, Bacterial Infections, Fungal Diseases
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.
Temperament
Semi Aggressive
Care Requirements
• Minimum 125 gallon tank with strong water circulation and open swimming space • Temperature range 72–78°F; maintain stable conditions to prevent stress and disease • Salinity 1.023–1.025 SG; use hyposalinity only for medical treatment under supervision • Feed 2–3 times daily with herbivore foods (macroalgae, nori, quality pellets); this species is obligate herbivorous • Keep singly or with non-tang species; highly aggressive toward conspecifics and other surgeonfish • Monitor for parasitic infections (ich, velvet) and white spot disease; provide quarantine facilities
Aka
Black-Spot Surgeonfish

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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