Purple Tang

The Purple Tang is a striking surgeonfish (family Acanthuridae) in the genus Zebrasoma, native to the Red Sea and western Indian Ocean. Its vivid violet-purple body paired with a contrasting bright yellow tail makes it one of the most visually distinctive tangs and a highly sought species in the marine aquarium trade. Like other Zebrasoma species, it has a deep, laterally compressed body suited to weaving through reef structure. Wild populations, centered on the Red Sea, remain healthy, and the species plays a role in grazing algae on the reefs it inhabits.

• Deep, oval, strongly laterally compressed body
• Solid vivid purple to violet-blue base coloration
• Bright yellow caudal (tail) fin, sharply contrasting with the body
• Fine dark speckling sometimes visible around the head and gill area
• Small, pointed snout with brush-like teeth
• Orange scalpel spine at the base of the tail; reaches 20-25 cm

Easily told apart from other purple-bodied tangs by the solid (unstriped) purple body combined with the sharply contrasting yellow tail.

Purple Tangs are native to the Red Sea and are also found along the Arabian Sea and Gulf of Aden, occupying coral reef slopes and lagoons at depths of about 2-20 m. They favor clear, warm tropical water with rocky or coral substrate covered in algal growth, often near strong currents that keep algae turf short and accessible. Juveniles tend to occupy shallower, more sheltered reef zones, while adults range more widely across open reef terrain.

This tang spends much of its day grazing filamentous algae from rock and coral surfaces, contributing to algal control on the reefs it inhabits. Purple Tangs are often solitary or seen in loose aggregations, and adults can be territorial toward one another, using their sharp caudal spine in defensive tail-flicking displays when contesting space or fending off threats. Juveniles are somewhat more tolerant of conspecifics than adults. Spawning occurs in open water, typically in group broadcasts near dusk, after which eggs and larvae disperse in the plankton before settling on reef habitat.