This species is unmistakable: it has a laterally flattened body, very long snout with a small mouth at the end. In some species the dorsal fin is very long and resembles a ribbon. The adults have a small horn between the eyes explaining the species name cornutus. The coloring varies between white and yellow with three large black transversal bands surrounded by blue. Above the snout there is a dark yellow spot. Reaches up to 25 cm.

• Origin: Indian-Pacific Ocean.

• Environment: Lives near the coast in regions of rocky coasts and coral reefs or at high sea. Aquarium temperature between 23 and 29 ºC, water pH between 8.2 and 8.6, density between 1020 and 1023, intense illumination and a bottom with plenty of open space for swimming.
  
  
• Food: This species is quite difficult to acclimate. It needs live food or vegetables. Can be fed Alcon Gold Spirulina Flakes, Alcon Gold Marin Flakes, Alcon Tubifex F. D. and Alcon Blood Worms F. D..
  
  
• Behavior: A very social species that does not swim long distances but is accustomed to moving in pairs or schools.