Gem Tang
Gem Tang (Zebrasoma gemmatum)
The Gem Tang is one of the rarest and most coveted tangs in the aquarium hobby, renowned for its jet-black body covered with brilliant white speckles and a contrasting yellow tail. Native to the waters off Madagascar and the Western Indian Ocean, this surgeonfish is a true collector’s gem — both in name and in appearance.
Active, hardy, and constantly grazing, the Gem Tang brings unmatched elegance and movement to large reef systems. Its rarity and striking beauty make it a centerpiece fish in any display.
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Scientific Name: Zebrasoma gemmatum
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Temperament: Semi-aggressive (especially toward other tangs)
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Reef Safe: Yes
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Diet: Herbivore — thrives on marine algae, nori sheets, spirulina, and quality herbivore pellets
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Care Level: Moderate to Difficult (requires excellent water quality and large swimming space)
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Max Size: ~8 inches
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Tank Size: 180+ gallons recommended for long-term health and activity
⚠️ Note: The Gem Tang is a rare and premium species. Introduce carefully if keeping with other tangs, and provide ample rockwork and open swimming areas to reduce aggression.
Collector’s Highlight: With its speckled “galaxy” pattern, the Gem Tang is one of the most visually striking and exclusive surgeonfish available — a true crown jewel for advanced reef keepers.
