Alex Mustard / Napoleon wrasse (Cheilinus undulatus) super male, patrolling coral, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea

Alex Mustard / Group of predators hunting together, in an example of 'Nuclear foraging'. The Moray eel (Gymnothorax javanicus) flushes out prey, and is followed by a Napolean wrasse (Cheilinus undulatus) and a Bluef...

Juergen Freund / A parade of giant manta rays (Manta birostris) at a cleaning station. North Raja Ampat, West Papua, Indonesia,

Juergen Freund / Giant manta ray (Manta birostris) at a cleaning station, seen from behind. North Raja Ampat, West Papua, Indonesia

Juergen Freund / Giant manta ray (Manta birostris) at a cleaning station. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Giant manta ray (Manta birostris) at a cleaning station with diver swimming behind it. North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Giant manta rays (Manta birostris) at a cleaning station. North Raja Ampat, West Papua, Indonesia.

Brent Hedges / Giant moray eel with Cleaner wrasse fish{Gymnothorax javanicus} Papua New Guinea

Doug Perrine / Wrasse blenny {Hemiemblemaria simulus} in giant brain coral, Bahamas, mimics cleaning wrasse

Georgette Douwma / Giant moray eel with Cleaner wrasse {Gymnothorax javanicus} Red Sea

Alex Mustard / Napoleon wrasse (Cheilinus undulatus) on a coral reef. Ras Mohammed National Park, Sinai, Egypt. Red Sea

David Fleetham / Female sheephead fish (Semicossyphus pulcher) and gorgonian fan amongst giant kelp (Macrocystis pyrifera) off Catalina Island, California, USA.