David Fleetham / Coronetfish (Fistularia commersonii) from above, showing the lens inside the eye. Hawaii.

Nature Production / Pacific Cornetfish {Fistularia commersonii} Ogasawara Islands, Tokyo, Japan

Doug Perrine / Dorsal view of Bluespotted cornetfish (Fistularia commersonii), showing blue spots on back, Honokohau, Kona Coast, Big Island, Hawaiian Islands, USA, Pacific Ocean.

Doug Perrine / Bluespotted cornetfish (Fistularia commersonii) swimming over coral reef with Yellow tangs (Zebrasoma flavescens) and Black Triggerfish (Melichthys niger) swimming behind, Honokohau, Kona Coast, Big I...

Tony Wu / Mauve-eyed hermit crab (Dardanus crassimanus) feeding on a Red cornetfish (Fistularia petimba), Kyushu, Japan, Pacific Ocean.

Pascal Kobeh / A school of Bluespotted cornetfish (Fistularia commersonii), Red Sea, Egypt.

Claudio Contreras / Bluespotted cornetfish (Fistularia commersonii), La Reina Islet, close to Cerralvo Island (Jacques Cousteau Island), Gulf of California Islands Protected Area, Gulf of California

David Fleetham / Bluespotted cornetfish (Fistularia commersonii), Hawaii.