Pascal Kobeh / Ocan Pacifique - Nouvelle caldonie - Gros plan de la tte d'un nason licorne (Naso brevirostris) de nuit Pacific Ocean - New Caledonia - A close-up of the head of a spotted or longnose unicornfish (Na...

Magnus Lundgren / Wild Wonders of China / Spotted unicornfish (Naso brevirostris) Green Island, a small volcanic island in the Pacific Ocean , Taiwan

David Fleetham / Green sea turtle (Chelonia mydas) followed closely by Spotted unicorn fish (Naso brevirostris) which feeds on turtle feces, Hawaii.

Pascal Kobeh / Bluestreak cleaner wrasse (Labroides dimidiatus) cleaning Spotted unicornfish (Naso brevirostris) Palau. Philippine Sea.

Pascal Kobeh / Diagonal-banded / Yellowbanded sweetlips (Plectorhinchus lineatus) cleaning Spotted unicornfish (Naso brevirostris) Palau. Philippine Sea.

Alex Mustard / Pair of Spotted unicornfish (Naso brevirostris) courtship display above the reef, Ari Atoll, Maldives, Indian Ocean.

Georgette Douwma / Spotted unicornfish (Naso brevirostris) and Blue-spine surgeonfish (Naso unicornis) composite image on black background, Maldives, Indian Ocean.

Georgette Douwma / Surgeonfish composite image on black background, Bluespine surgeonfish (Naso unicornis), Striped surgeonfish (Acanthurus lineatus), Sailffin tang (Zebrasoma veliferum) juvenile, Mimic surgeonfish (Aca...

Georgette Douwma / Tropical reef fish composite image on black background, Thornback cowfish (Lactoria fornasini), Longnose filefish (Oxymonacanthus longirostris), Blackbarred sandperch (Parapercis tetracantha), Lyretai...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Falcula butterflyfish (Chaetodon falcula), Yellow boxfish (Ostracion cubicus), Golden butterflyfish (Chaetodon semilarvatus), Red Sea clo...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Sailfin tang (Zebrasoma veliferum) juvenile, Pajama cardinalfish (Sphaeramia nematoptera), Three-spot angelfish (Apolemichthys trimaculat...

David Fleetham / Pletail unicornfish (Naso brevirostris) juvenile, its horn will continue to grow as it gets older. Fiji Pacific Ocean.