Juergen Freund / Bignose unicornfish (Naso vlamingii) swimming past coral reef, West New Britain, Papua New Guinea.

Gary Bell/ Oceanwide / Unicornfish (Naso vlamingii), Papua New Guinea

Bert Willaert / Bignose unicornfish (Naso vlamingii), Kimbe Bay, West New Britain, Papua New Guinea

Alex Mustard / Bignose unicornfish (Naso vlamingii) profile of male displaying (the blue stripe at the bottom of the frame is the tail of another individual) Baa Atoll, Maldives. Indian Ocean.

Inaki Relanzon / Bignose Unicornfish (Naso vlamingii) Komodo National Park, Indonesia.

Inaki Relanzon / Bignose Unicornfish (Naso vlamingii) courting pair, Komodo National Park, Indonesia.

Ingo Arndt / Unicornfish (Naso vlamingii) eye, Great Barrier Reef, Australia

Fred Bavendam / Unicornfish (Naso vlamingii) being cleaned by a Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Bali, Indonesia

Doug Perrine / Bignose unicornfish {Naso vlamingii} Micronesia, Pacific

Joel Sartore / Photo Ark / Bignose unicornfish (Naso vlamingii) portrait, Aquarium of Boise. Captive, occurs in Indo-Pacific.

Joel Sartore / Photo Ark / Bignose unicornfish (Naso vlamingii) head portrait, Aquarium of Boise. Captive, occurs in Indo-Pacific.

Joel Sartore / Photo Ark / Bignose unicornfish (Naso vlamingii) portrait, Aquarium of Boise. Captive, occurs in Indo-Pacific.