Zebrasoma xanthurum
The Purple Tang is a show-stopping surgeonfish from the Red Sea, cloaked in deep violet-blue with a contrasting bright yellow tail. Like all tangs, it is an active herbivore that needs a large aquarium (125+ gallons) with ample swimming space and regular offerings of marine algae and seaweed. Can be aggressive toward other tangs, best kept as the sole surgeonfish unless the tank is very large.
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