🐠 Black Spot Tang (Acanthurus bariene)
🐠 Black Spot Tang (Acanthurus bariene)
An Olive-Brown Body With a Bold Black Gill Spot • Orange-Rimmed Eyes and Fin Accents • One of the Calmer Deep-Water Rarities
📋 The Black Spot Tang, also known as the Bariene Surgeonfish, Eye-Spot Tang, or Roundspot Tang, has a handsome olive-brown body with irregular grey-blue lines, a distinctive round black spot at the upper gill opening, an orange-rimmed eye, and yellow-orange dorsal and anal fins. Its colours are more subdued as a juvenile, developing into its full, striking pattern only with maturity.
It ranges across a wide stretch of the Indo-West Pacific, from Mozambique and the Maldives to the Solomon Islands, north to the Ryukyu Islands, and south to the Great Barrier Reef, where it inhabits deep coastal reef slopes and outer reef walls, typically below 15 metres and often deeper than 30 metres. That deep-water habitat makes it a a rarity in the aquarium trade. Every Black Spot Tang we ship is feeding well.
Despite its large adult size, it's one of the calmer Acanthurus species, and otherwise peaceful with tankmates. It's fully reef safe, though it should be the only tang in most home aquarium setups, since it can become territorial toward other similarly shaped tangs as it matures. It reaches up to 50cm, so plan on at least 900L.
💡 Highlights
🎨 Olive-Brown With a Black Gill Spot: A striking pattern that develops with maturity
🌊 A Deep-Water Rarity: Collected from depths often greater than 30 metres
😌 One of the Calmer Tangs: Mellower than many Acanthurus relatives despite its size
🍽️ Ships Feeding Well: A confident eater for a large tank
🌿 Fully Reef Safe: Won't harm corals or invertebrates
🧾 A Quick Look at the Black Spot Tang
📛 Common Name: Black Spot Tang (Bariene Surgeonfish, Eye-Spot Tang, Roundspot Tang)
🔬 Scientific Name: Acanthurus bariene
👨👩👧 Family: Acanthuridae
🌍 Origin: Indo-West Pacific (Mozambique, Maldives to Solomon Islands, Ryukyu Islands, Great Barrier Reef)
📏 Max Size: Up to 50cm (≈ 20")
🧂 Specific Gravity: 1.020-1.025
🌡️ Temperature Range: 22-26°C (72-78°F)
🧠 Care Level: Moderate; a calm species that needs serious tank planning
💖 Temperament: Semi-aggressive; one of the mellower large tangs
🌿 Reef Safe: Yes
🏠 Min Tank Size: 900 L (≈ 240 gallons)
📌 Tank Level: Mid level
🧬 Stock Type: Wild-collected as standard stock; a deep-water rarity in the trade
⏳ Lifespan: 10-15 years or more with proper care
🍽️ Diet: Herbivore (algae, spirulina, seaweed)
🐣 Reproduction: Pelagic spawner; not bred in home aquariums

















