🐠 Convict Tang (Acanthurus triostegus)
🐠 Convict Tang (Acanthurus triostegus)
Marine Reef-Safe Tang • White Body With Bold Black Stripes • One of the More Peaceful Tangs • Beginner-Friendly Marine Fish
📋 The Convict Tang (Acanthurus triostegus), also known as the Convict Surgeonfish or "Manini" in Hawaii, has a striking white-to-silver body crossed by six bold black vertical bars, resembling an old-fashioned prison uniform — exactly where the common name comes from.
One of the most widely distributed surgeonfish in the world, this species is found across the Indo-Pacific, from the Red Sea and East Africa all the way to Hawaii and French Polynesia, typically grazing shallow reef flats and lagoons in groups or large schools.
Genuinely one of the more peaceful tangs available, the Convict Tang rarely shows aggression toward tank mates, though other tang species may harass it, so it's usually best kept without unrelated tangs unless the aquarium is very large. As a naturally schooling species, multiple Convict Tangs can be kept together successfully if introduced simultaneously as similarly sized juveniles into a suitably large tank.
With ample swimming space and consistent algae-based feeding, it thrives as a Hardy Peaceful Reef Display Fish.
⚪⚫ Highlights
🎨 Bold Black-and-White Striping: Distinctive convict-style pattern
🐟 Genuinely Peaceful for a Tang: One of the calmer surgeonfish species available
🌿 Reef Safe: Compatible with corals and invertebrates
🏫 Naturally Schooling: Can be kept in groups if introduced together as similarly sized juveniles
🧠 Beginner Friendly: Hardy and adaptable once properly acclimated
🧾 A Quick Look at the Convict Tang
📛 Common Name: Convict Tang (Convict Surgeonfish, Manini)
🔬 Scientific Name: Acanthurus triostegus
👨👩👧 Family: Acanthuridae
🌍 Origin: Indo-Pacific (Red Sea, East Africa to Hawaii, French Polynesia)
📏 Max Size: Up to 20 cm (≈ 8")
🧂 Specific Gravity: 1.023–1.026
🌡️ Temperature Range: 24–27°C (75–81°F)
🧠 Care Level: Beginner to Intermediate
💖 Temperament: Peaceful — one of the calmer tangs; may be harassed by other tang species
🌿 Reef Safe: ✅ Yes
🏠 Min Tank Size: 380 L (≈ 100 gallons)
📌 Tank Level: Mid to Upper Level
🧬 Stock Type: Wild-collected as standard stock; not currently bred in captivity
⏳ Lifespan: 5–7 years in well-maintained aquariums
🍽️ Diet: Herbivore (algae-focused; some meaty foods)
🐣 Reproduction: Egg Layer (pelagic spawner; forms large spawning aggregations); not bred in home aquariums

















