Gem Tang - Africa

Zebrasoma gemmatum

(1 Reviews)

Gem Tang - Africa

Gem Tang - Africa

Zebrasoma gemmatum

(1 Reviews)

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Gem Tang - Africa Care Facts

Care Level: Moderate
Temperament: Peaceful
Diet: Omnivore
Reef Safe: Yes
Minimum Tank Size: 180 gallons
Max Size: 9 inches

The Gem Tang, Zebrasoma gemmatum, is an extremely rare variation of tang. The Gem Tang is famous for its spectacularly brilliant white spots across its iridescently shimmering black body. Its yellow anal fin further adds to the Gem Tang's starkly contrasting hues. The Gem Tang should be the centerpiece of a large tank, will eat meaty and herbivorous foods, can grow up to 8 inches, and is reef compatible. 

The Exquisite Gemmatum "Gem" Tang (Zebrasoma gemmatum) in Saltwater Marine Aquariums

The Gemmatum Tang, known as the "Gem" Tang, is a captivating and prized addition to saltwater marine aquariums. Its vibrant colors and distinct patterns bring elegance and splendor to any reef environment. Let's delve into the Gemmatum Tang's habitat, reef-safe nature, size, lifespan, diet, aquaculture potential, compatibility, suitable tank mates, tank requirements, other common names, and compatible tank mates.


The Gemmatum Tang is native to the pristine waters of the Western Indian Ocean, specifically around Madagascar's coast. In the wild, they inhabit coral reefs and rocky areas with strong currents.

Reef Safe

Considered reef safe, the Gemmatum Tang mainly feeds on algae and plant matter. However, like all tangs, they may need more algae and appropriate food to prevent coral nipping.

Size and Lifespan

Growing up to 7 to 8 inches (17 to 20 cm), the Gemmatum Tang can live several years with proper care.


This tang is herbivorous, primarily consuming filamentous and macroalgae in the wild. In captivity, they require a varied diet of high-quality marine algae sheets, spirulina-based pellets, and occasional fresh or frozen vegetables.


While less common in the trade, most Gemmatum Tangs are collected from the wild due to the rarity of captive-bred specimens.


Generally peaceful but territorial towards similar species, selecting compatible tank mates is vital for harmony.

Suitable Tank Mates

  • Angelfish (e.g., Emperor Angelfish): Certain angelfish species add diversity to the tank's appearance.
  • Wrasses (e.g., Six-Line Wrasse): Peaceful wrasses provide movement and color.
  • Boxfish (e.g., Yellow Boxfish): Peaceful boxfish offer a unique addition.
  • Anthias (e.g., Lyretail Anthias): Suitable, especially in larger aquariums with ample space.
  • Clownfish (e.g, Ocellaris Clownfish): Suitable in reef tanks, other species of clownfish are also suitable

Tank Requirements

A spacious aquarium with ample swimming space and hiding spots mimics their natural habitat. Stable water conditions and proper filtration are essential.

Other Common Names

Also known as the "Star Gem Tang" or "Starry Sailfin Tang."

In conclusion, the Gemmatum "Gem" Tang (Zebrasoma gemmatum) is a breathtaking addition to saltwater marine aquariums. Its vibrant colors and distinct patterns make it highly sought-after. Provide a suitable environment and compatible tank mates to admire the allure and beauty of these tangs in your aquarium. With care, the Gemmatum Tang can thrive and become the focal point of admiration.

Love this Gem Tang! He is so beautiful and such an interesting personality! He doesn't bother anyone and has actually become friends with our yellow wrasse! They swim attached at the hip looking for food! He is a very mellow swimmer who loves swimming through the rock work to find new caves. He is a little hard to feed when competing with quicker eaters, I let a couple pellets sink in front of him and sink a few spirulina flakes! I highly recommend him, he is sweet, beautiful, and easy!

Reviewed by: Shia M. on Jan. 1, 2022

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