Powder Blue Tang (Acanthurus leucosternon)

The Powder Blue Tang is one of the most iconic and visually stunning surgeonfish in the reef hobby, known for its vibrant blue body, yellow dorsal fin, and bold white facial mask. While highly sought after, it is also one of the more sensitive tang species and is best suited to experienced marine aquarists.

This fish is a true showpiece in large reef systems but requires stable water conditions, strong oxygenation, and careful introduction to avoid stress-related illness.

Scientific Name

Acanthurus leucosternon

Common Names

• Powder Blue Tang
• Blue Surgeonfish
• White-Faced Tang

Care Level

Advanced

Temperament

Semi-aggressive (can be highly territorial)

Reef Safe

Yes — completely reef safe

Minimum Tank Size

500L+

Adult Size

Up to ~25cm

Lifespan

8–12+ years with proper care

Natural Habitat

Powder Blue Tangs are found in the Indo-Pacific, particularly around reef slopes and surge zones with strong water movement. They are active grazers, constantly feeding on algae growing on rocks and reef surfaces.

In the wild, they are often seen patrolling large territories and interacting with other tang species.

Diet & Feeding

Powder Blue Tangs are primarily herbivores and require a strong algae-based diet.

Recommended Foods

• Marine algae sheets (nori)
• Spirulina pellets and flakes
• Herbivore pellets
• Marine macroalgae
• Occasional mysis shrimp
• Enriched frozen herbivore blends

Feed 2–3 times daily to maintain immune strength and coloration.

Water Parameters

• Temperature: 24–26°C
• Salinity: 1.024–1.026
• pH: 8.1–8.4
• Nitrate: <10–15ppm
• Ammonia/Nitrite: 0

Stable, high-quality water conditions are critical for this species.

Tank Setup

Powder Blue Tangs require large, mature reef systems with strong flow and excellent oxygenation.

Ideal Setup Includes

• Large swimming space
• Mature live rock for grazing
• Strong, turbulent water movement
• High oxygen levels
• Secure lid (active swimmer and jumper risk)

This species performs best in established aquariums with stable parameters and low stress environments.

Compatibility

Powder Blue Tangs can be aggressive, especially toward other tangs.

Compatible With

• Clownfish
• Wrasses
• Foxface
• Dwarf angelfish (larger systems)
• Anthias
• Gobies and blennies

Use Caution With

• Other Acanthurus tangs (especially similar shapes)
• Small or timid fish in confined systems
• Overcrowded reef tanks
• Poor introduction order (often best added last or carefully staged)

Common Mistakes

Poor Acclimation

Powder Blue Tangs are highly sensitive to stress and require careful drip acclimation and stable conditions.

Adding Too Early or Too Late

Poor introduction order often triggers aggression from established fish.

Inadequate Oxygen/Flow

They thrive in high-flow environments and can decline in stagnant systems.

Ignoring Disease Risk

They are more prone to marine ich (Cryptocaryon) when stressed.

Fun Facts

• Powder Blue Tangs are considered one of the most beautiful but challenging tangs in the hobby
• Their white face mask helps reduce glare and may aid reef navigation
• They are highly intelligent and quickly learn feeding routines
• In the wild, they constantly graze and rarely remain still

Why Buy Powder Blue Tangs From Aquamarine Aquaristic?

At Aquamarine Aquaristic, our Powder Blue Tangs are carefully selected, conditioned, and feeding strongly before sale. We prioritise healthy, stable specimens and provide guidance to ensure successful acclimation in advanced reef systems.