Black Shoulder Tang (Acanthurus Nigricauda)

The Black Shoulder Tang is a striking marine fish prized for its distinctive dark shoulder patches and sleek, contrasting body. With a predominantly dark (almost black) body accented by lighter markings on the shoulders, this tang adds a dramatic visual appeal to large aquariums. Known for its active algae grazing, the Black Shoulder Tang plays a vital role in maintaining a balanced tank ecosystem. Its robust and territorial nature requires a spacious, well-established environment, making it best suited for advanced aquarists.

Care Information
Maximum Size: Up to 10 inches.
Tank Size: 125 gallons minimum; requires a spacious tank with ample open swimming areas and plenty of live rock for grazing and hiding.
Diet: Herbivorous; primarily grazes on marine algae, seaweed sheets (nori), spirulina, and high-quality herbivore pellets. Supplemental feedings with fresh vegetables such as zucchini or spinach can be beneficial.
Water Temp: 72-78°F.
Salinity: 1.020-1.025.
Aggression: Semi-aggressive; generally peaceful but may display territorial behavior toward other tangs or similar-shaped fish.
Skill Level: Intermediate to Advanced; requires a stable, mature tank with consistent water quality and ample grazing opportunities.
Reef Compatibility: Reef-safe; does not harm corals or invertebrates, making it an excellent addition to established reef tanks.

Special Feature – Distinctive Markings and Active Grazing
Easily recognized by its unique dark shoulder patches, the Black Shoulder Tang’s contrasting coloration makes it a standout in any aquarium. Its active grazing behavior helps control unwanted algae, contributing to a healthier, more balanced ecosystem.

Compatibility
This tang is best housed in large community tanks with other peaceful species. Adequate space is crucial to minimize territorial disputes and ensure ample swimming room.

Coloration

• Indo-Pacific Region: Typically exhibits a dark, almost black body with contrasting lighter shoulder markings that create a striking visual contrast under aquarium lighting.

Typical Habitat

• Distribution: Native to the Indo-Pacific, particularly in coral reef environments rich in algae. In captivity, it thrives in mature setups with plenty of live rock and open swimming spaces.