Zebrasoma scopas — Scopas Tang (also known as Brown Tang, Twotone Tang)
Family: Acanthuridae
Origin: Indo-Pacific — from the eastern coast of Africa to Japan, Indonesia, and the Great Barrier Reef
Size: Up to 20 cm (8 inches)
Lifespan: 5–10 years (can live longer with excellent care)
 
Natural Habitat
Environment: Coral reefs, reef slopes, and lagoons with abundant algae growth
Water Conditions: Warm, stable marine environments with moderate flow
Temperature Range: 24–28°C (75–82°F)
 
Physical Description
Body Shape: Deep, disc-shaped body with elongated snout
Coloration:
Variable shades of brown to yellow-brown with lighter body and darker posterior
Fine vertical striping and pale face; color may darken with age
Fins: Large dorsal and anal fins; sharp scalpel-like spine at the base of the tail
 
Aquarium Care
Tank Size: Minimum 100 gallons (380 litres); more space improves behavior and longevity
Water Parameters:
pH: 8.1–8.4
Salinity: 1.020–1.025 SG
Temperature: 24–28°C (75–82°F)
Water Flow: Moderate to strong
Substrate: Sand or crushed coral
Décor: Live rock for grazing and hiding; open swimming room is essential
Filtration: Strong filtration with stable marine parameters and good oxygenation
 
Diet
Type: Primarily herbivorous
Preferred Foods:
Marine algae (nori, spirulina), high-fiber vegetable-based pellets
Occasional protein (mysis shrimp, brine shrimp) for balance
Feeding Frequency: 2–3 times daily
Behavior & Tank Mates
Temperament:
Generally peaceful but may be territorial with similar-shaped tangs
Active and hardy; good beginner tang compared to others
Compatible Tank Mates:
Peaceful reef-safe fish (clownfish, wrasses, gobies, chromis)
Avoid housing with other Zebrasoma or similarly shaped tangs in small tanks
Behavior Notes:
Constant grazer; helps control algae in reef tanks
May change color slightly when stressed or at night
 
Breeding
Spawning Method: Broadcast spawner
Breeding Conditions:
Not bred in home aquariums; wild spawning observed in groups at dusk
Fry Care:
Planktonic larvae require specialized care not currently feasible for hobbyists