Scopas Tang

The Scopas Tang (Zebrasoma scopas) is a hardy, algae‑grazing surgeonfish from the Indo‑Pacific, known for its brown‑to‑yellow gradient coloration, peaceful temperament (for a tang), and suitability for medium‑to‑large reef aquariums. It’s one of the more adaptable and beginner‑friendly tangs, though still active and territorial toward similar species. 🐠 Identity & Appearance • Scientific name: Zebrasoma scopas • Common names: Scopas Tang, Brown Tang, Twotone Tang, Brush‑tail Tang • Coloration: • Adults: pale to dark brown body with fine pale blue‑green longitudinal lines, fading into dots near the head. • Tail: typically dark brown to black. • Juveniles: paler, with yellowish bars and more prominent yellow speckling. • Rare morphs (koi, yellow, albino) exist and are highly valued. • Size: Up to 40 cm / 16 in maximum published length, though aquarium specimens typically reach 6–8 inches. 🌍 Natural Habitat & Range • Distribution: Widely spread across the Indo‑Pacific, from East Africa to Japan, Australia, and the central Pacific. • Depth: 1–60 meters, commonly on coral‑rich reefs, lagoons, and outer reef slopes. • Ecological role: Constant filamentous algae grazer, helping maintain reef balance. 🧠 Behavior & Temperament • Temperament: Semi‑aggressive but less aggressive than many other tangs; generally peaceful except toward other tangs or similarly shaped fish. • Social structure: • Adults may form small groups or loose schools. • Juveniles are solitary, often sheltering among corals. • Reef‑safe: Yes—does not harm corals. 🏡 Aquarium Requirements • Minimum tank size: 75 gallons (300 liters) recommended due to active swimming and territorial behavior. • Aquascape: • Plenty of live rock for grazing. • Open swimming lanes. • Water parameters: • Temp: 75–82°F • Salinity: 1.023–1.026 • pH: 8.0–8.4 • Hardiness: Considered easy to moderate—adaptable and tolerant of a range of conditions. 🍽️ Diet • Primary diet: Herbivore—feeds mainly on filamentous algae in the wild. • In captivity: • Nori • Spirulina • Algae‑based pellets • Occasional meaty foods as supplements • Feeding frequency: 2–3 small feedings daily to mimic natural grazing. 🧬 Lifespan & Health • Lifespan: Up to 33 years reported in the wild (inferred from FishBase data). • Common issues: Susceptible to ich and velvet if stressed; stable water quality is essential. 🪸 Compatibility • Good with: Peaceful reef fish, wrasses, rabbitfish, anthias. • Use caution with: Other tangs—especially Zebrasoma species—due to territoriality. • Best practice: Add the Scopas Tang before more aggressive tangs or introduce tangs simultaneously.