Orange-Shoulder Tang

The Orange-Shoulder Tang (Acanthurus olivaceus) is a vibrant marine species native to the Indo-Pacific region, known for its distinctive orange shoulder spot and active nature. This tang is a popular choice among aquarium enthusiasts due to its striking appearance and dynamic behavior.

(REEF SAFE / INTERMEDIATE)

Essential Information:

• Common Names: Orange-Shoulder Tang, Orange-Band Surgeonfish, Orange-Spot Surgeonfish
• Scientific Name: Acanthurus olivaceus
• Family: Acanthuridae
• Origin/Habitat: Found in the Indo-Pacific region, including areas such as the Maldives, Tuamotu Islands, Ryukyu Islands, and the Great Barrier Reef.
• Maximum Size: Up to 14 inches (35 cm) in the wild; typically 8 to 10 inches (20 to 25 cm) in captivity.
• Lifespan: Can live up to 10 years with proper care.
• Level of Difficulty: Intermediate; requires a well-established aquarium with stable water parameters and a consistent food supply.

Appearance & Physical Traits:

• Coloration & Pattern: Juveniles are bright yellow with a black spot on the shoulder. As they mature, they develop a more subdued coloration with a prominent orange spot on the shoulder.
• Body Shape & Structure: Elongated body with a pronounced, slender snout adapted for grazing on algae.

Habitat & Environmental Needs:

• Minimum Tank Size: A 75-gallon (285 liters) tank is recommended for juveniles; adults require a 180-gallon (680 liters) tank or larger.
• Water Temperature: Maintain between 75°F and 82°F (24°C to 28°C).
• pH Level: Keep between 8.1 and 8.4.
• Specific Gravity: Optimal range is 1.020 to 1.025.
• Aquascape: Provide live rock with ample hiding spots and open swimming areas.

Diet & Feeding:

• Diet Type: Herbivorous
• Preferred Foods: Marine algae, nori, spirulina, and other dried marine-based algae.
• Feeding Frequency: Feed small amounts 2 to 3 times daily to accommodate their high metabolism.

Behavior & Compatibility:

• Temperament: Generally peaceful; may become territorial towards other tangs or surgeonfish, especially in smaller tanks.
• Social Behavior: Best kept singly or in pairs; avoid keeping with aggressive species.
• Tank Mate Compatibility: Compatible with most peaceful marine species; avoid aggressive fish that may stress the Orange-Shoulder Tang.
• Activity Level: Highly active, often seen grazing on algae and swimming throughout the tank.

Care Considerations & Additional Notes:

• Ease of Care: Ideal for intermediate hobbyists due to its specific dietary and environmental requirements.
• Special Requirements: Requires a well-established aquarium with stable water parameters and a consistent food supply.
• Breeding Info: Little is known about breeding the Orange-Shoulder Tang in captivity.
• Additional Notes: The Orange-Shoulder Tang is considered reef-safe and can be kept in reef aquariums. However, it may nip at certain corals and invertebrates, so monitor interactions closely.