Common name: Orange Shoulder Tang

General Information

The Orange Shoulder Tang, scientifically known as Acanthurus olivaceus, is a striking species in the aquarium trade, admired for its vibrant coloration and unique body markings. This species is easily recognizable by its distinct orange band that runs across its shoulder, which is especially prominent in juveniles.

Juvenile Orange Shoulder Tangs display a vibrant yellow coloration across their entire body, making them particularly eye-catching in reef tanks. As they mature, this bright yellow fades into a more subdued but still beautiful palette of blues and grays, with the distinctive orange shoulder band remaining a key feature.

In the wild, these tangs play a crucial role in maintaining the health of coral reefs by grazing on algae, preventing overgrowth that could smother corals. Their presence in home aquariums not only adds a splash of color but also helps educate aquarists about the delicate balance of reef ecosystems.

Care

Orange Shoulder Tangs require a spacious aquarium with plenty of swimming room and live rock for grazing. They thrive in well-maintained systems with stable water parameters and a balanced diet. These tangs are moderately easy to care for, making them suitable for aquarists with some experience in marine fish keeping.

A tank of at least 500 liters is recommended to accommodate their active swimming habits and potential adult size. Good water quality and a varied diet are essential for their health and longevity.

Diet and Feeding

In their natural habitat, Orange Shoulder Tangs are herbivores, primarily feeding on algae. In captivity, they should be provided with a diet rich in marine-based algae, supplemented with high-quality pellets and occasional treats of frozen or live foods.

Regular feeding of nori or spirulina-based foods can help maintain their vibrant coloration and support their immune system. Feeding should be done at least twice a day to ensure they receive adequate nutrition.

Behavior and Compatibility

Orange Shoulder Tangs are generally peaceful but can exhibit territorial behavior, especially towards other tangs or similarly shaped fish. They are best kept with a variety of other peaceful species in a community reef tank.

While not aggressive, they may show dominance over new additions, so it's important to monitor their interactions and provide plenty of hiding spaces to reduce stress.

Health and Common Issues

With proper care, Orange Shoulder Tangs can live for many years in captivity. It's important to maintain optimal water quality and provide a balanced diet to prevent common health issues such as ich or lateral line disease.

When selecting an Orange Shoulder Tang, look for active individuals with clear eyes and vibrant colors. Avoid fish that show signs of stress or disease, such as clamped fins or erratic swimming.

Habitat

The Orange Shoulder Tang is native to the Indo-Pacific region, found in coral-rich lagoons and outer reef slopes. They are typically seen at depths ranging from 5 to 30 meters, where they graze on algae-covered surfaces.

Their natural habitat is characterized by warm, clear waters with abundant coral growth, which should be mimicked in the home aquarium to ensure their well-being.