Description
Blue Tang – Paracanthurus hepatus
Paracanthurus hepatus, commonly known as the Blue Tang, Regal Tang, or Palette Surgeonfish, is one of the most recognizable and beloved marine species worldwide. Its brilliant sapphire-blue body, jet-black patterning, and vibrant yellow tail make it an instant focal point in any aquarium. Active, social, and highly intelligent, the Blue Tang thrives in large, well-oxygenated systems where it can swim freely and graze throughout the day.
Origin: Indo-Pacific – from East Africa and Japan to Indonesia, the Great Barrier Reef, and Samoa
Depth: 2–40 m (6–130 ft)
Lighting: Moderate to high (enhances blue coloration and tail contrast)
Flow: Strong, consistent water movement preferred
Tank Placement: Mid to upper water column; requires ample open swimming areas and secure rockwork
Temperature: 75–80°F (24–27°C)
Salinity: 1.022–1.026 SG
pH: 8.1–8.4
Diet: Herbivorous – grazes on filamentous algae; supplement with nori, spirulina, and enriched herbivore blends
Temperament: Peaceful to semi-aggressive; may become territorial toward other tangs in smaller systems
Size: Up to 25 cm (10 inches)
Care Level: Intermediate – hardy once acclimated but prone to marine ich (Cryptocaryon); requires pristine water and good nutrition
Compatibility: Suitable for peaceful community and reef aquariums; best kept singly or in large systems with compatible species
