Yellow Fin Tang

Acanthurus xanthopterus

The Yellow Fin Tang is a large, impressive surgeonfish that makes a fantastic centrepiece for a properly sized reef aquarium. With its silver-grey body, yellow pectoral fins, and distinctive blue and yellow markings around the face and fins.

Unlike some of the smaller tang species, the Yellow Fin Tang can grow quite large and is a very active swimmer. It needs a spacious, mature aquarium with plenty of open swimming room, strong circulation, and established rockwork to explore and graze on.

Care & Temperament

• Difficulty: Intermediate

• Temperament: Generally peaceful but can become territorial

• Adult Size: Grows up to 20 to 24 inches (50–60 cm) in length.

• Minimum Aquarium: 180+ gallons recommended

• Swimming Level: Throughout the aquarium

• Activity: Very active

Yellow Fin Tangs are best suited to larger, established aquariums. They spend much of their day swimming through the rockwork and grazing, so plenty of swimming space is important, while they are generally peaceful with most community reef fish they may become territorial toward other surgeonfish, especially after establishing a territory.

Diet

The Yellow Fin Tang is primarily an herbivore and should have regular access to marine algae. A varied diet will help maintain good colour, body condition, and overall health.

We recommend feeding:

• Nori and other marine algae

• Spirulina-based foods

• High-quality herbivore pellets

• Marine flakes

• Frozen foods as part of a varied diet

Offering algae regularly is especially important for tangs and helps encourage their natural grazing behaviour.

Tankmates & Compatibility

Yellow Fin Tangs can work well in a community reef aquarium when housed with appropriately sized tankmates. They are generally peaceful toward fish that don't compete directly for territory.

Good tankmates include:

• Clownfish

• Wrasses

• Gobies

• Blennies

• Anthias

• Cardinalfish

• Larger peaceful reef fish

Use caution with:

• Other tangs and surgeonfish

• Similar-looking or similarly shaped fish

• Adding new fish after the tang has established its territory

In larger aquariums, careful stocking and plenty of rockwork can help reduce territorial behaviour.

Reef Safe

Yes — Reef Safe

Yellow Fin Tangs are excellent reef inhabitants and generally leave corals and ornamental invertebrates alone. Their natural grazing behaviour can also be helpful for keeping algae under control.

Suggested Parameters

• Temperature: 24–27°C (75–81°F)

• Salinity: 1.024–1.026

• pH: 8.0–8.4

• Alkalinity: 7–11 dKH

• Ammonia: 0 ppm

• Nitrite: 0 ppm

• Nitrate: Ideally below 10–20 ppm

• Phosphate: Ideally below 0.1 ppm

Stable water quality, good oxygenation, and strong circulation are important for this active species.

What You Are Buying

You are purchasing one Yellow Fin Tang (Acanthurus xanthopterus). Size, colouration, and markings can vary between individual fish.

Health & Acclimation Notes

Tangs can be sensitive to stress and poor water quality, particularly when first introduced. Give your new Yellow Fin Tang a calm acclimation and plenty of hiding places while it settles in.

• Acclimate carefully to your aquarium's temperature and salinity.

• Provide established rockwork for grazing and shelter.

• Offer algae soon after introduction.

• Avoid adding a tang to a newly established aquarium.

• Monitor closely for signs of stress or disease during the first few weeks.

Why We Love It

The Yellow Fin Tang is a great choice for the experienced reef keeper looking for something a little different. Its large size, active swimming style, and unique yellow and blue markings make it a real standout fish. Once established, it becomes a confident and constantly active member of the reef and is sure to draw attention every time someone looks into the tank.