The Unicorn Tang (also known as the Unicornfish or Naso Tang) is a unique species of surgeonfish known for its elongated horn-like extension on its forehead, especially prominent in mature males. This horn resembles that of a unicorn, hence the name. Here’s a breakdown of its characteristics and care requirements if kept in an aquarium:
Appearance:
- Horn: Mature males have a pronounced horn on the forehead. This horn can be absent or much shorter in females and younger individuals.
- Color: They are generally grayish-blue to grayish-green with blue edges on their dorsal and anal fins. Their tails often have a yellow or blue hue.
- Size: They can grow quite large, up to 24 inches (60 cm) in length in the wild. However, in captivity, they typically range from 12 to 18 inches.
Natural Habitat:
- They are found in the Indo-Pacific region, from East Africa to the Hawaiian Islands.
- Unicorn Tangs prefer clear, current-swept terraces of seaward reefs.
Aquarium Care:
- Tank Size: Due to their potential size and active nature, a larger aquarium is necessary, preferably at least 180 gallons or more.
- Diet: They are herbivores and mainly feed on macroalgae in the wild. In an aquarium, they should be provided with plenty of marine-based seaweed and algae. This can be supplemented with high-quality pelleted foods and occasional meaty treats.
- Tank Mates: While generally peaceful, they can be territorial with other tangs or fish of similar shape, especially in smaller tanks. They are best kept with other non-aggressive species.
- Environment: They need plenty of open swimming space, but also some rocky areas or live rock where they can graze for algae.
- Health: Like other tangs, they are prone to skin parasites and diseases. It’s essential to monitor their health and maintain good water quality.
Behavior:
- They are active swimmers and will often be seen cruising around the aquarium. They’re generally peaceful but might become more aggressive when they mature.
Conclusion: The Unicorn Tang is a fascinating and unique addition to any large marine aquarium. Due to their size and requirements, they’re best suited for experienced aquarists who can provide them with the space and care they need. Always ensure that you can cater to their needs before purchasing such a fish.
