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Bluespine Unicorn Tang
Please Note: Due to variations within species, your item may not look identical to the image provided. Approximate size range may also vary between individual specimen.
Bluespine Unicorn Tang (Naso unicornis)
Additional locales and sizes may be available!

Quick Stats

Care Level Moderate
Temperament Semi-aggressive
Color Form Blue, Green
Diet Herbivore
Reef Compatible Yes
Water Conditions sg 1.020-1.025, 72-78° F, dKH 8-12, pH 8.1-8.4
Max. Size 2'
Origin Indonesia, Maldives, Philippines, Sri Lanka, Tonga
Family Acanthuridae
Minimum Tank Size 360 gallons
Compatibility View Chart
What do these Quick Stats mean? Click here for more information


The Bluespine Unicorn Tang, also known as the Unicorn Tang and Unicornfish, and is blue-green to olive in color, with a blue edge on the dorsal and anal fins. Two bright blue dots appear at the peduncle spines near the tail.

The horn of the Bluespine Unicorn Tang develops when the fish reaches a size of approximately 6 inches. It is located far back on the head and does not extend farther than the tip of the snout. It has large, permanently erect peduncle spines which can easily be tangled in a net or cause injury to the handler.

A 360 gallon or larger aquarium is necessary to provide plenty of swimming room and places to hide. It is aggressive towards its own species, but peaceful with other fish.

Although Tangs will eat meaty foods along with the other fish in the aquarium, it is important that they are offered plenty of marine based seaweed and algae. This will strengthen their immune system, reduce aggression and improve their overall health. Offer dried seaweed tied to a rock or use a veggie clip, and feed at least 3 times per week. Sea Veggies, Seaweed Salad and Ocean Nutrition are all ideal products and are very easy to use.

Approximate Purchase Size: Juvenile: Small: 1-1/2" to 2-1/4"; Medium: 2-1/4" to 4-1/4"; Large: 4-1/4" to 6-1/4" XLarge: 6-1/4" to 7"; With horn: Large: 5" to 7"; XLarge: 7" to 12"

Customer Testimonials

Jose Martinez Corona , NY
This is a wonderful addition to any tank of 180 gallons or more. I've had my Unicorn Tang after the 3rd day of my tank set up and it has proven to be a hardy fish. This fish starts off shy for about 3 to 7 days but after it gets accustomed to the aquarium it is all over the tank. So far I have noticed that it prefers to be around a lot of rock when stressed and the color changes to a dark brown. When feeding, it actually takes seaweed out of my hand and allows me to touch it on its side or its tail. If you don't have one buy one. This is a great buy and it is inexpensive. It's almost like having a fish as a friend.
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