Epaulette Tang - Acanthurus nigricauds

Small

$77.59

$77.59 $96.99

Epaulette Tang - Acanthurus nigricauds

Reef Safe Tang

$77.59

$77.59 $96.99

SKU: TANGxEpauletS

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Diet

algae/nori spirulina mysis brine shrimp

Min Tank Size 125 gallons

Temperament Semi-aggressive

Reef Safe Yes

Care & Diet Feeding, nutrition, and best practices.

Diet Type: Omnivore

Diet and Feeding: Epaulette Tang are primarily herbivorous algae grazers in nature, spending much of the day browsing filamentous algae, turf algae, and other marine plant matter with incidental detritus and microfauna. In captivity, it is beneficial to make the bulk of the diet high-quality marine algae and herbivore fare such as nori (red and green seaweed), dried seaweed sheets, spirulina-based flakes, herbivore pellets, and algae wafers. To ensure balanced nutrition, supplement regularly with small portions of mysis shrimp, enriched brine shrimp, finely chopped clam or krill, and occasional frozen herbivore blends, while keeping these richer foods as treats rather than staples. Offer seaweed on a clip or feeding grid and rotate feeding locations to encourage natural foraging and grazing behavior. Feed small amounts 2–3 times daily, removing uneaten food promptly, and avoid overfeeding to maintain water quality and prevent digestive issues.

algae/nori spirulina mysis brine shrimp

Behavior Temperament, activity level, and interactions.

Temperament: Semi-aggressive

Epaulette Tang is an active, constant swimmer that spends most of the day cruising open water and grazing, so it requires ample length for uninterrupted swimming along with areas of rockwork for refuge and foraging. Temperament is generally semi-aggressive and highly territorial, especially toward conspecifics and other similarly shaped tangs, so it is best kept singly unless in a very large system. A minimum tank size of 120 gallons is recommended, with plenty of open space, strong water movement, and visual barriers created by rockwork to break up sightlines and reduce territorial disputes. In mixed communities, it can coexist with robust, reef-safe species and is usually reef-safe itself, though it may become domineering toward passive tank mates or other surgeonfish. Dietary habits are primarily herbivorous to omnivorous, with a strong preference for algae and other plant matter, supplemented by marine-based prepared foods and occasional meaty fare. Frequent grazing is important for both health and behavior, and a varied diet helps prevent stress and aggression.

Tank & Aquascape Tank requirements and aquascaping tips.

Min Tank Size: 125 gallons
Max Size: 10 inches
Care Level: Moderate
Origin: Indo-Pacific

Compatibility Tank mates, aggression, and introduction order.

Temperament: Semi-aggressive
Reef Safe: Yes

Reef & Health Reef safety, common issues, and prevention.

Reef Safe: Yes
Care Level: Moderate

FAQs Answers to the most common questions.

How big of an aquarium does an Epaulette Tang really need, and is a 4-foot tank enough long-term?

For a healthy adult Epaulette Tang, a 6-foot tank is the realistic minimum, with 180 gallons or larger being a better long-term home. A 4-foot tank may work only for a very small juvenile for a short time, but these tangs are active swimmers and need length more than height. In undersized tanks they often become stressed, which shows up as reduced feeding, pacing, and aggression.

Is an Epaulette Tang one of the tangs that will actually eat algae all day, or does it need a very specific diet?

It is not an algae-only fish. An Epaulette Tang should be fed a varied herbivore diet with marine algae as the core: nori, spirulina-based foods, high-quality pellets, and frozen foods like mysis or brine shrimp in moderation. Like many tangs, it grazes constantly, so small feedings or clipped seaweed offered daily are ideal. Good nutrition is important because poor diet often leads to faded coloration and a weakened immune system.

How aggressive is an Epaulette Tang compared with other tangs, and what tankmates usually cause problems?

It can be territorial, especially toward other tangs and similarly shaped fish. It usually does best when added to a spacious tank before more aggressive tankmates establish territory. Problems are most common with other Acanthurus tangs, similarly colored fish, or any fish competing for the same grazing space. Peaceful community fish are usually fine, but cramped tanks make even a normally manageable Epaulette Tang become aggressive.

What are the biggest warning signs that an Epaulette Tang is stressed or declining in health?

The biggest red flags are loss of appetite, heavy breathing, lingering in corners, rapid color fading, frayed fins, and visible white spots or dusty patches. Tangs also commonly show early stress by rubbing on rocks or flashing against objects. Because they are sensitive to poor water quality and transport stress, any sign of suppressed feeding should be treated seriously. Stable salinity, strong oxygenation, and pristine water are essential.

Does an Epaulette Tang need extra current and oxygen, or can it do fine in a normal reef tank flow?

It does best with strong, varied flow and excellent oxygenation. This species comes from high-energy reef environments and is built to handle moving water, so a low-flow tank often leaves it listless. The best setup is brisk circulation with some calmer areas for resting, plus strong surface agitation to keep oxygen levels high. In warm tanks, low oxygen is one of the fastest ways to stress a tang.

Goes well with:

Almost WYSIWYG – you will receive a similar fish in shape and color to the species shown.

Introduction to Saltwater Tangs

Tangs, also known as Surgeonfish, are active, fast-swimming herbivores known for their bold coloration, streamlined bodies, and role in controlling algae growth. Found in coral reefs worldwide, tangs require large aquariums with strong water flow to accommodate their constant movement and grazing habits. While peaceful toward most tankmates, tangs can be territorial and aggressive toward other tangs, particularly those of the same genus. They are best suited for well-established reef tanks with ample swimming space and hiding spots.

Care Requirements

Care Level: Moderate – Requires large tank Minimum Tank Size: 75 – 180+ gallons Smaller species (e.g., Kole Tang) – 75+ gallons Larger species (e.g., Achilles Tang, Blue Hippo Tang) – 125-180+ gallons Aquarium Setup: Requires open swimming areas, rockwork for hiding, and high water flow Tangs are strong swimmers that thrive in environments with high oxygen levels and strong filtration. They are prone to stress-related illnesses like Ich, making stable water parameters essential.

Diet & Nutrition

Tangs are herbivores that require a diet rich in plant-based foods for optimal health and vibrant coloration. Diet: Herbivorous – Prefers marine algae, seaweed, and plant-based foods

Recommended Foods:

Nori and seaweed sheets (offered daily) Spirulina-based flakes and pellets Blanched vegetables like zucchini and spinach Occasional protein-based foods like mysis shrimp for variety A nutrient-rich diet prevents nutritional deficiencies and lateral line erosion (HLLE), a common issue in tangs.

Lifespan & Growth Rate

Lifespan: 8-20+ years Growth Rate: Moderate to Fast – Many species reach 8-12 inches Tangs require long-term care and proper nutrition to reach their full lifespan and size.

Temperament & Compatibility

Temperament: Semi-Aggressive – Generally peaceful but territorial toward other tangs Reef Safe? Yes – Does not harm corals or invertebrates Tangs do well in reef aquariums and community tanks with: Clownfish Wrasses Angelfish Large gobies They may become aggressive toward other tangs, especially those with similar body shapes or coloration. Introducing multiple tangs at once in a large tank can help reduce aggression.

Common Challenges & Considerations

Prone to Marine Ich: Tangs are susceptible to Ich and other parasites, so quarantine before introducing to display tanks. Territorial Behavior: Can be aggressive toward new tangs, requiring careful introduction. Water Conditions Temperature: 74-80°F dKH (Alkalinity): 8-12 pH: 8.1-8.4 Specific Gravity: 1.020-1.025 Tangs thrive in high-quality reef conditions with strong filtration to support their active swimming habits.

Color Varieties & Popular Species

Tangs come in a wide range of colors and patterns, making them one of the most visually striking fish families in the hobby. Yellow Tang (Zebrasoma flavescens) – Bright yellow body, one of the most popular reef fish Blue Hippo Tang (Paracanthurus hepatus) – Electric blue body with black markings, also known as the "Dory" fish Kole Tang (Ctenochaetus strigosus) – Brownish body with blue highlights, a fantastic algae grazer Achilles Tang (Acanthurus achilles) – Black body with orange crescent tail, one of the most challenging tangs to keep