Powder Brown Tang - Acanthurus japonicus
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The Powder Brown Tang (Acanthurus japonicus) is a striking reef fish admired for its bold color contrast and active swimming behavior. Its brown body is rimmed in yellow, with a white tail and black fins accented by orange and white highlights, making it a standout centerpiece in large reef aquariums.
Common Name: Powder Brown Tang
Scientific Name: Acanthurus japonicus
Family: Acanthuridae
Size: Up to 9 inches (23 cm)
Temperament: Semi-aggressive
Difficulty: Moderate
Reef Safe: Yes
Native Region: Found throughout the western Pacific, particularly around coral-rich lagoons and reef slopes.
Tank Size: Minimum of 125 gallons
Temperature: 74–82°F (23–28°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Provide plenty of live rock for grazing and swimming space; strong water movement is recommended.
• Diet: Herbivorous—feeds primarily on algae; supplement with seaweed sheets and spirulina-based foods.
• Behavior: Active swimmer that may display territorial tendencies toward other tangs.
• Tankmates: Compatible with other semi-aggressive species; avoid keeping with similarly sized or colored tangs to reduce aggression.
• Maintenance: Requires stable water parameters and ample swimming space for optimal health.