Juergen Freund / Tourists helmet diving and walking around the shallow reefs of Green Island, surrounded by Deep bodied fusilier (Caesio cuning) Great Barrier Reef, Queensland, Australia October 2016.

Juergen Freund / Tourists helmet diving and walking around the shallow reefs of Green Island, surrounded by Deep bodied fusilier (Caesio cuning) Great Barrier Reef, Queensland, Australia October 2016.

Juergen Freund / Tourists helmet diving and walking around the shallow reefs of Green Island, surrounded by Deep bodied fusilier (Caesio cuning) Great Barrier Reef, Queensland, Australia October 2016.

Juergen Freund / Tourists helmet diving and walking around the shallow reefs of Green Island, surrounded by Deep bodied fusilier (Caesio cuning) Great Barrier Reef, Queensland, Australia October 2016.

Georgette Douwma / Redbelly yellowtail fusilier / Deep bodied fusilier (Caesio cuning) swimming through Black coral (Antipathes dichotoma), West Papua, Indonesia.

David Hall / RF - Gorgonian coral sea fans (Melithaea sp.) with Yellowtail fusiliers (Caesio cuning) and Banana fusiliers (Pterocaesio pisang) feeding on zooplankton in midwater. Also seen among the sea fans are D...

David Hall / RF - Yellowtail fusiliers (Caesio cuning) school swimming over a reef with many healthy soft and hard corals, with an Eyestripe surgeonfish (Acanthurus dussumieri) among them, Raja Ampat, Indonesia, P...

David Hall / A large, mixed aggregation of fish swimming through a reef cut, including (from top to bottom) Eyestripe surgeonfish (Acanthurus dussumieri), Yellowtail fusiliers (Caesio cuning), Sergeant damselfish...

Nick Hawkins / School of yellowtail fusiliers (Caesio cuning) on reef in Raja Ampat, West Papua, Indonesia. Pacific Ocean.