Powder Blue Tang Identification Guide

Key identification features

• Laterally compressed, oval body in a bright, uniform powder-blue color, reaching about 23 cm
• Bold black mask crossing the face and snout, sharply contrasting with the pale body
• A distinct white patch on the chin and chest area just below the mask
• Bright yellow band running along the top of the dorsal fin
• Sharp white scalpel-like spine at the base of the tail, along with a black margin edging the pectoral fins

Common look-alikes

• Blue Tang (Regal Tang): has a palette-shaped black pattern across the body and a bright yellow tail, quite different from the Powder Blue Tang's solid body color and plain facial mask.
• Sohal Surgeonfish: shows bold horizontal blue-and-black stripes across the body rather than a solid powder-blue tone.
• Other Acanthurus tangs: generally lack the specific combination of black facial mask, white chest patch, and yellow dorsal band seen together in this species.

Where you'll see one

Powder Blue Tangs inhabit coral-rich reef slopes and lagoons of the Indian Ocean, ranging from East Africa to Indonesia, where they graze algae in areas with moderate current and clear water.