Glossary:
The Gem tang, or Zebrasoma gemmatum, isn’t like other tangs. What sets this fish apart most is its price, as you can expect to spend up to four figures on this species, depending on the specimen. You’ll want to ensure you have plenty of money to spend and the ability to care for this fish if you’re considering adding it to your saltwater aquarium.
The following Gem tang care guide can help you determine if this fish is worth the cost.
Yes, the Gem tang is a reef-safe fish that won’t go after your corals or invertebrates. The only inhabitants of your tank that you might need to worry about are other potentially competitive tangs or incompatible tank mates.
Although aggressive and territorial, the Gem tang is an herbivore and loves to feed on macroalgae, including Caulerpa mexicana and Caulerpa prolifera. Additionally, you’ll want to feed this fish veggies such as nori, broccoli, seaweed salad, and zucchini.
Some meaty foods can also help maintain the fish’s healthy coloration, including Mysis and brine shrimp.
If you want to keep a Gem tang in your aquarium, you’ll need to give it plenty of space. Ideally, your tank should be around 180 gallons or larger. The reason for this space requirement is the need for ample live rock for shelter along with space for swimming.
The Gem tang is a solitary fish that’s both territorial and aggressive in most cases. As a result, you’ll want to avoid keeping this fish with any potential competition and ensure its tank mates can hold their own.
The Gem tang is a pretty hardy fish that doesn’t require too much care to maintain it. Simply provide your Gem with plenty of algae and other suitable foods, avoid potentially rivalrous or vulnerable tank mates, and ensure the tank has plenty of clean water.
You’ll want to set aside a big budget for this fish if you want to add it to your aquarium. This fish is typically priced at anywhere from around $400 to as much as $1,500 or more. The pricing will depend on its size, rarity, and other factors, but it’s among the most expensive saltwater fish available for its visual appeal and exotic qualities.
Here are some interesting facts you might want to know about the Gem tang:
Unless you keep a breeding pair, Gem tangs won’t get along well with each other and typically demand separate tanks or very large ones—hence the 180-gallon tank size limit for this species. You’ll also want to avoid including any fish that resemble your Gem tang, as this could confuse your Gem.
However, some compatible tank mates that may work with your Gem tang include:
Conversely, you’ll want to avoid including fish such as triggerfish, batfish, and rabbitfish.
You can buy the Gem tang from many online aquarium shops, including:
If you have the budget and the required tank conditions, a Gem tang may be a worthwhile addition to a saltwater aquarium.