🐠 Gem Tang (Zebrasoma gemmatum)
🐠 Gem Tang (Zebrasoma gemmatum)
Marine Reef-Safe Large Grazing Tang • Black Body Covered in Vibrant White Spots With Yellow Tail • Genuinely One of the Most Expensive Fish in the Hobby • Expert-Only Species
⚠️ Important Information — Please Read First
We want to be genuinely upfront on this one, given the investment involved. This species commands a genuinely serious price tag, reflecting its real rarity and the extreme difficulty of collecting it from deep surge zones. Please ensure you have a genuinely spacious, well-established tank of 680 litres (180 gallons) or more before purchasing, along with a confirmed feeding history where possible.
📋 The Gem Tang, also known as the Gemmatum Tang, Spotted Tang, or Jewelled Tang, has a genuinely striking jet-black body covered in a galaxy of vibrant white spots, with a bright yellow tail and yellow accents on the pectoral fins.
Native to the Western Indian Ocean, around Madagascar, Mauritius, Réunion, Mozambique, and South Africa, this species genuinely inhabits deep reef environments at depths of 25 to over 60 metres, typically found solitary and territorial in the wild — a genuinely challenging habitat that makes collection extremely difficult.
This species is genuinely one of the most prized and expensive fish in the entire saltwater aquarium hobby, with real market prices ranging from several hundred to several thousand dollars depending on size and availability. It's fully reef safe and a genuinely valuable, constant algae grazer. We want to be honest that it's semi-aggressive, particularly toward other tangs and similarly shaped fish, and is best kept as the only tang in the tank.
⚫⚪ Highlights
🎨 Black Body With White Spots & Yellow Tail: A genuinely iconic, unmistakable "starry night" pattern
💎 Genuinely One of the Most Expensive Aquarium Fish: A real investment given its rarity
🌊 Genuine Deep Surge-Zone Habitat: Extremely difficult to collect, explaining its price
🌿 Fully Reef Safe: A valuable, constant algae grazer
⚠️ Genuinely Territorial: Best kept as the only tang in the tank
🧾 A Quick Look at the Gem Tang
📛 Common Name: Gem Tang (Gemmatum Tang, Spotted Tang, Jewelled Tang)
🔬 Scientific Name: Zebrasoma gemmatum
👨👩👧 Family: Acanthuridae
🌍 Origin: Western Indian Ocean (Madagascar, Mauritius, Réunion, Mozambique, South Africa)
📏 Max Size: Up to 23 cm (≈ 9")
🧂 Specific Gravity: 1.020–1.025
🌡️ Temperature Range: 23–28°C (74–82°F)
🧠 Care Level: Expert Only — genuine investment given rarity
💖 Temperament: Semi-Aggressive; genuinely territorial toward other tangs
🌿 Reef Safe: ✅ Yes
🏠 Min Tank Size: 680 L (≈ 180 gallons)
📌 Tank Level: Mid Level
🧬 Stock Type: Wild-collected as standard stock; genuinely one of the rarest tangs in the trade
⏳ Lifespan: Genuinely 10-20 years with proper care
🍽️ Diet: Herbivore (algae, spirulina, seaweed)
🐣 Reproduction: Pelagic spawner; genuinely not bred in home aquariums

















