Alex Mustard / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.

Alex Mustard / Green turtle (Chelonia mydas) resting on sea floor and two juvenile Golden trevally (Gnathanodon speciosus). Marsa El Shouna, Marsa Alam, Egypt.

Alex Mustard / Whale shark (Rhincodon typus) close to the camera with a golden trevally fish (Gnathanodon speciosus) and outline of another whale shark behind , in the plankton-rich green waters of La Paz bay, Baja...

Jordi Chias / Blue spotted trevally (Caranx bucculentus) hunting small fish in the reef, South Ari Atoll, Maldives, Indian Ocean.

Pete Oxford / Whale Shark (Rhincodon typus) and Golden trevally (Gnathanodon speciosus) Cenderawasih Bay, West Papua, Indonesia.

Pete Oxford / Whale Shark (Rhincodon typus) close up of spotted skin, with Golden trevally (Gnathanodon speciosus) Cenderawasih Bay, West Papua, Indonesia.

Pete Oxford / Whale Shark (Rhincodon typus) and Golden Trevally (Gnathanodon speciosus) school, Cenderawasih Bay, West Papua, Indonesia

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...

Pete Oxford / Horse eye trevally / jack (Caranx latus) Jardines de la Reina National Park Cuba, Caribbean

Jeff Rotman / Bluefin Trevally (Caranx melampygus) hunting Caesio Bluefish / Lunar Fusilier (Caesio lunaris). The Red Sea, Egypt.

Juergen Freund / Dugong (Dugong dugon) in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines

Juergen Freund / School of Bigeye jacks / Trevally (Caranx sexfasciatus). Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Giant trevally (Caranx ignobilis) chasing shoal of Oxeye Scads (Selar boops) in the house reef of Miniloc Island Resort, El Nido, Palawan, Philippines

Juergen Freund / Green turtle (Chelonia mydas) with schooling Bigeye jacks / trevally (Cranax sexfasciatus). Sipadan Island, Sabah, Malaysia, June

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed with trevally fish inspecting the disturbed sand. Dimakya Island, Palawan, Philippines

Juergen Freund / School of Bigeye jacks / trevally (Caranx sexfasciatus). Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / School of Bigeye jacks / trevally (Caranx sexfasciatus) and Yellow line / Yellowstripe scads (Selaroides leptolepis). Misool, Raja Ampat, West Papua, Indonesia

Tim Laman / Large school of Trevally (Caranx) shelter beneath the jetty at Arborek Village. Many village docks in this area act as shelter for these fish, which provide a handy source of protein for villagers in...

Fred Bavendam / Whale Shark (Rhincodon typus) with Golden Trevally (Gnathanodon speciosus) group swimming in front of its mouth, Exmouth, Australia

Juergen Freund / Schooling trevally / jacks (Caranx), Indo-Pacific

Chris Newbert / Bigeye Trevally (Caranx sexfasciatus) school, 40 feet deep, Solomon Islands

Peter Scoones / Yellow / Goldsaddle goatfish (Parupeneus cyclostomus) hunting together with Bluefin Jacks (Caranx melampygus) and Chinese sea kraits {Laticauda semifasciata} over coral reef, Gunung Api, Banda sea, In...

David Shale / Trevally {Selene vomer} pelagic juvenile, West Atlantic.

Chris Newbert / Bigeye Trevally (Caranx sexfasciatus) schooling, 30 feet deep, Solomon Islands

Chris Newbert / Bigeye Trevally (Caranx sexfasciatus) school, 40 feet deep, Solomon Islands

Norbert Wu / Bigeye Trevally (Caranx sexfasciatus) school form a moving circle, Borneo

Fred Bavendam / Bigeye Trevally (Caranx sexfasciatus) school with diver, Bali, Indonesia

Alex Mustard / Black and white photo of school of Bigeye trevally (Caranx sexfasciatus) form a circular shoal in open water, on the drop off of a coral reef. Ras Mohammed National Park, Sinai, Egypt. Red Sea. Highly...

Alex Mustard / School of Bludger trevally (Carangoides gymnosthethus) throng over a coral reef, with a giant barrel sponge (Xestospongia muta). Misool, Raja Ampat, West Papua, Indonesia. Misool Marine Protected Area...

Alex Mustard / RF - A school of adult Giant trevally (Caranx ignobilis) swimming near a coral reef. Red Sea

Shane Gross / Caribbean reef shark (Carcharhinus perezi) and Horse eye jack (Caranx latus) shoal silhouetted underneath catamaran boat, Bahamas.

Gary Bell/ Oceanwide / Bigeye Trevally (Caranx sexfasciatus) school, Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Bigeye Trevally (Caranx sexfasciatus) school under pier, Great Barrier Reef, Australia

Pascal Kobeh / Yellowmouth barracuda (Sphyraena viridensis) with a white / silver trevally / guelly jack (Pseudocaranx dentex), Canary Islands

Graham Eaton / Shoal of Hardyhead Silverside (Atherinomorus lacunosus) hunted by a shoal of Bluefin Trevally (Caranx melampygus) along a shoreline. Komandoo Island, Maldives, January.

Graham Eaton / Giant trevally (Caranx ignobilis) Komandoo Island, Maldives, January

Graham Eaton / Bluefin Trevally (Caranx melampygus) in deep water, Komandoo Island, Maldives.

Doug Perrine / Dugong or Sea cow (Dugong dugon) feeding on seagrass with commensal juvenile Golden trevally (Gnathanodon speciosus) Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.

Franco Banfi / Scuba diver swimming with a big shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Franco Banfi / Shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Franco Banfi / Scuba diver on the sandy bottom surrounded by shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Franco Banfi / Scuba diver on the sandy bottom surrounded by shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Franco Banfi / Big Gulf grouper (Mycteroperca jordani) in front of a Shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Doug Perrine / Dugong or Sea cow (Dugong dugon) feeding on seagrass with commensal juvenile Golden trevally (Gnathanodon speciosus) Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.

Franco Banfi / Scuba diver swim between shoal of Dog snapper, (Lutjanus novemfasciatus) and shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Franco Banfi / Shoal of Dog snapper, (Lutjanus novemfasciatus) in front of shoal of Big-eye jacks (Caranx sexfasciatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Alex Mustard / Few fish from a school of Bigeye trevally (+Caranx sexfasciatus) break off to scratch themselves against the flank of a blacktip reef shark (Carcharhinus melanopterus). This is a common and world wide...

Alex Mustard / Long exposure of school of Bigeye trevally (Caranx sexfasciatus) swimming in front of a jetty, close to sunset. Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific Ocean.

Alex Mustard / Long exposure portrait of a Tawny nurse shark (Nebris ferrungineus), with Pink whipray (Himantura fai) and Bluefin trevally (Caranx melampygus) at dusk. Vavuu Atoll, Maldives. Indian Ocean

Ralph Pace / Bigeye Trevally (Caranx sexfasciatus) school, Cabo Pulmo National Park, Baja California, Mexico

Nick Hawkins / Divers observing large school of Bigeye trevally (Caranx sexfasciatus). Near Cocos Island National Park, Costa Rica.

Nick Hawkins / Bigeye trevally (Caranx sexfasciatus), a large shoal. Cocos Island National Park, Costa Rica.

Nick Hawkins / Bluefin trevally (Caranx melampygus), two off Cocos Island National Park, Costa Rica.

Nick Hawkins / Bluefin trevally (Caranx melampygus) swimming amongst other fish. Cocos Island National Park, Costa Rica.

David Fleetham / Bluefin trevally (Caranx melampygus), two above coral reef. Hawaii.

David Fleetham / Bluefin trevally (Caranx melampygus) swimming over coral reef, motion blurred image. Hawaii.

David Fleetham / Tille trevally (Caranx tille), two in inshore reefs. Between Yap and Palau, Micronesia.

David Fleetham / Jack (Caranx sp), shoal of juveniles following Southern stingray (Dasyatis americana), searching for prey. Bahamas.

Alex Mustard / Bigeye trevally (Caranx sexfasciatus) swim in front of volcanic boulders. Darwin Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean.

Alex Mustard / Bigeye trevally (Caranx sexfasciatus) forming a circular shoal in blue water, on the drop off of a coral reef. Ras Mohammed National Park, Sinai, Egypt. Red Sea

Linda Pitkin / Golden trevally (Gnathanodon speciosus), Triton Bay, near Kaimana, West Papua, Indonesia

David Fleetham / Green sea turtle (Chelonia mydas) swimming through a school of Bigeye jacks (Caranx sexfasciatus) off the island of Sipidan, Malaysia.

David Fleetham / White ulua (Caranx ignobilis) Molokin Marine Preserve, Maui, Hawaii.

David Fleetham / Bluefin trevally (Caranx melampygus), Hawaii.

David Fleetham / Yellowspot trevally (Carangoides fulvoguttatus), Hawaii.

David Fleetham / Bluefin trevally / jack (Caranx melampygus), Hawaii.

David Fleetham / Bluefin jack / trevally (Caranx melampygus), Hawaii.

Linda Pitkin / Bluefin trevally (Caranx melampygus) mixed-species foraging and hunting behaviour, with Giant moray (Gymnothorax javanicus). Shark Reef to Jolande, Ras Mohammed National Park, Egypt, Red Sea.

Georgette Douwma / Cheese plant or Mexican bread plant. (Monstera deliciosa) large house plant growing in office. Native to Mexico and Central America.

Georgette Douwma / Cheese plant or Mexican bread plant. (Monstera deliciosa). flower. Native to Mexico and Central America.

Michel Roggo / Crevalle Jack (Caranx hippos) and other fish entering Homosassa Spring for the winter, Homosassa Springs Wildlife Park, Florida, USA. March. Photographed for the Freshwater Project.

Alex Mustard / Large school of Bigeye jacks (Caranx sexfasciatus) over a coral reef, made up of predominantly Acropora sp. hard corals. Tubbataha reef, Tubbataha Reefs Natural Park, UNESCO World Heritage Site Palawa...

Alex Mustard / School of predatory Horse-eye jack (Caranx latus) swim over a coral reef. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea

Franco Banfi / Shoal of Bigeye Jack (Caranx sexfasciatus) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Shoal of Bigeye jack (Caranx sexfasciatus) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Shoal of Bigeye jack (Caranx sexfasciatus) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Shoal of Bluefin trevally (Caranx melampygus) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Shoal of Black jacks (Caranx lugubris) Fernando de Noronha Marine National Park, Brazilian Atlantic Islands UNESCO World Heritage Site, Pernambuco, Brazil, South Atlantic Ocean

Franco Banfi / Blue-fin trevally (Caranx melampygus) and scuba diver with soft coral (Dendronephthya), Aldabra Atoll, Natural World Heritage Site, Seychelles, Indian Ocean.

Alex Mustard / RF - Caribbean reef shark (Carcharhinus perezi) female swimming over a coral reef, while a school of Horse-eye jack swims away (Caranx latus) East End, Grand Cayman, Cayman Islands. British West Indie...

Claudio Contreras / Black jack (Caranx lugubris), Green Jack (Caranx caballus) and Redtail triggerfish (Xanthichthys mento), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Oc...

Claudio Contreras / Bluefin trevally (Caranx melampygus) and Redtail triggerfish (Xanthichthys mento), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, M...

Claudio Contreras / Bigeye Trevally (Caranx sexfasciatus), Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Bigeye Trevally (Caranx sexfasciatus), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Bluefin Trevally (Caranx melampygus), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Silky Shark (Carcharhinus falciformis) and Bigeye Trevally (Caranx sexfasciatus), Silky Shark IUCN Near Threatened, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands),...

Claudio Contreras / Giant Manta Ray (Manta birostris) and Black Jack (Caranx lugubris), Giant Manta Ray IUCN Vulnerable, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean,...

Claudio Contreras / Giant Manta Ray (Manta birostris) and Black Jack (Caranx lugubris), Giant Manta Ray IUCN Vulnerable, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean,...

Claudio Contreras / Bluefin Trevally (Caranx melampygus), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Black Jack (Caranx lugubris) near Giant Manta Ray (Manta birostris), tail, IUCN Vulnerable, Socorro Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexic...

Claudio Contreras / Black Jack (Caranx lugubris), Socorro island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Bluefin Trevally (Caranx melampygus), Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, W...

Claudio Contreras / Black Jack (Caranx lugubris), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, Wes...

Claudio Contreras / Bigeye Trevally (Caranx sexfasciatus), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific O...

Claudio Contreras / Bigeye Trevally (Caranx sexfasciatus), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific O...

Claudio Contreras / Bigeye Trevally (Caranx sexfasciatus), Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Oce...