Rosamond Gifford Zoo

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Dragon Sensory Hours: The dragons will be asleep from 2 to 4:30 p.m. daily.

Bignose Unicorn Tang

Naso vlamingii

The Bignose Unicorn tang is a fish found commonly by itself or in small schools in caves or near large drop-offs in the Pacific Ocean. The color of these fish vary depending on their age and surroundings, but the general trend is that juveniles are green while adults can change from pale to dark at will.

Range & Habitat

The Bignose Unicorn tang can be found in the Indo-Pacific, north of Southern Japan. Additionally, it has been seen through Micronesia, north of Australia. The Bignose Unicorn tang can often be found among deep coral reefs or caves, as well as large shipwrecks.


Conservation Status: Least Concern

According to a study done in 2010, the Bignose Unicorn tang’s global threat level is Least Concern, although the population is generally decreasing.


In the wild: Bignose Unicorn tang feed on zooplankton, usually during the day above reef slopes

At the zoo: Primarily brine shrimp.


Life Span

As long as 40 to 45 years, both in the wild and in human care.

Fun Facts about the Bignose Unicorn Tang

     Bignose Unicorn tangs are able to quickly hide or reveal their bright blue markings by changing the color of their skin.

     Bignose Unicorn tangs love to play in divers’ bubbles.

     Despite its name, the Bignose Unicorn tang does not have the characteristic “horn” of it’s fellow unicornfish!


Bignose unicorn. (n.d.). Two Oceans Aquarium. Retrieved February 24, 2021, from

Bignose unicornfish. (n.d.). Georgia Aquarium. Retrieved February 24, 2021, from

Bignose unicornfish (Naso vlamingii). (n.d.). Whats That Fish. Retrieved February 24, 2021, from

Updated June 13, 2023
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