🐠 Black Shoulder Tang (Acanthurus nigricauda)
A Grey-Brown Body With a Black Shoulder Streak • Rapid Colour-Shifting for Communication • One of the Calmer, More Uncommon Tangs
 
📋 The Black Shoulder Tang, also known as the Epaulette Surgeonfish or Eye-Stripe Tang, has a handsome grey-to-brown body with a distinctive black "epaulette" streak behind the eye, orange-based pectoral fins, and a white-based tail with a dark, blue-edged outer band.
It ranges across a wide stretch of the Indo-Pacific, from East Africa and Madagascar to the Tuamotu Islands, north to southern Japan, and south to Australia and New Caledonia, and it's uncommon in the aquarium trade, reaching a substantial adult size. Every Black Shoulder Tang we ship is feeding well.
It has a fascinating natural behaviour: it can rapidly shift its body colour from light to dark, used as communication during courtship, aggression, or to signal it's ready to be cleaned by other fish. Despite its large size, it's one of the calmer, more peaceful surgeonfish species, and juveniles are naturally found schooling together in the wild. It's fully reef safe, and given its substantial adult size, it should be the only tang in most home aquarium setups, since it can be assertive toward other similarly shaped tangs. It reaches up to 45cm, so plan on at least 800L.
 
💡 Highlights
🎨 Grey-Brown With a Black Shoulder Streak: A handsome, distinctive tang
🎭 Rapid Colour-Shifting: Communicates mood and readiness for cleaning
😌 One of the Calmer Tangs: Less territorial than many Acanthurus relatives
🌿 Fully Reef Safe: Won't harm corals or invertebrates
🍽️ Ships Feeding Well: A confident eater for a large tank