Unicorn Tang Care Guide
Naso unicornis · Saltwater Tang

What Unicorn Tang look like
The Unicorn Tang, scientifically known as Naso unicornis, exhibits a distinctive morphology characterized by its elongated body, which can reach a maximum adult size of approximately 12 inches (30 cm). This species is notable for its prominent, horn-like extension on the forehead, which is more pronounced in males, indicating sexual dimorphism. The body is adorned with a vibrant blue to yellow coloration, often exhibiting a gradient effect, with a yellow tail fin and a series of small, sharp spines along the caudal peduncle that serve as defensive adaptations against predators. The lateral line is well-defined, and the fish possesses a unique dentition adapted for grazing on algae, featuring a set of flat, molar-like teeth that facilitate efficient scraping. The dorsal fin is elongated and can be raised or lowered, contributing to its agile swimming capabilities.
Behavior & temperament
The Unicorn Tang is a social fish often found in small groups or pairs, exhibiting a hierarchical structure within their social interactions. They are primarily mid-water swimmers, frequently seen grazing on algae in the water column or near the substrate. Breeding behavior involves courtship displays, where males exhibit vibrant coloration and engage in swimming displays to attract females. In terms of temperament, they can be territorial, particularly males, and may exhibit aggressive behaviors towards other tangs or similar species, especially in confined spaces. Their behavior is also characterized by a tendency to establish and defend a specific area within the reef, which they patrol regularly.
Diet & feeding
In the wild, the Unicorn Tang primarily feeds on a diet of algae, particularly filamentous algae and detritus. In captivity, they require a varied diet that includes high-quality marine algae, spirulina, and herbivore pellets to maintain optimal health.
Behind the name
The genus name 'Naso' is derived from the Latin word for 'nose', referring to the prominent nasal horn, while 'unicornis' comes from the Latin 'unicornis', meaning 'one horn', highlighting the species' distinctive forehead extension.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Unicorn Tang?
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