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Blackstreak Surgeonfish (Acanthurus nigricauda)

Find Blackstreak 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.

Blackstreak Surgeonfish
Photo: Ahmed Abdul Rahman · CC BY-SA 4.0
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Where to buy Blackstreak 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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    Search Petco

About Blackstreak Surgeonfish

Acanthurus nigricauda is a moderately large surgeonfish with an olive-brown to yellowish-green body and a distinctive black vertical stripe or "streak" running from the gill cover toward the tail. The caudal fin is yellow, and the fish possesses the characteristic scalpel-like venomous spine on each side of the caudal peduncle typical of tangs.

Key facts

Diet
herbivore
Care Level
Moderate
Temperament
Semi Aggressive
Care Requirements
• Minimum 150 gallon tank, with ample swimming space and rock hiding places • Temperature range 72–82°F; maintain stable parameters to reduce stress and disease risk • pH 8.1–8.4; salinity 1.020–1.025 specific gravity • Provide plenty of macroalgae and vegetable matter to satisfy natural browsing behavior • Can become territorial toward other herbivorous fish and may be aggressive with smaller fish; introduce carefully and observe for compatibility
Diet Details
Feed a varied herbivorous diet including high-quality marine algae sheets (nori), spirulina, and vegetable matter. Supplement with occasional small amounts of mysis shrimp or other meaty foods. Feed 1–2 times daily.
Reef safety
Reef Safe with Caution
Difficulty Level
Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.
Appearance
Acanthurus nigricauda is a moderately large surgeonfish with an olive-brown to yellowish-green body and a distinctive black vertical stripe or "streak" running from the gill cover toward the tail. The caudal fin is yellow, and the fish possesses the characteristic scalpel-like venomous spine on each side of the caudal peduncle typical of tangs.
Max Size
20
Feeding Schedule
1-2 times daily
Aka
Epaulette Surgeonfish
Family
Acanthuridae

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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