Alex Mustard / Southern stingray (Dasyatis americana) two swimming over sand bar, under stormy sky. Grand Cayman, Cayman Islands. British West Indies.

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) swimming close to surface. Brothers Islands, Egypt.

Shane Gross / Caribbean reef shark (Carcharhinus perezi), two from below, one close up. Caribbean Sea off Gardens of the Queen National Park, Cuba.

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...

Franco Banfi / School of Munk's devil ray, pygmy devil ray, (Mobula munkiana), feeding on plankton at night, photographed on a long exposure, Espiritu Santo Island, Sea of Cortez, Baja California, Mexico, East Pacif...

Nick Hawkins / Blue shark (Prionace glauca) with a pair of pilot fish (Naucrates ductor) off Halifax, Nova Scotia, Canada. July.

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) profile portrait, just below surface, off the West Coast of Auckland, New Zealand, February

Alex Mustard / Great white shark (Carcharodon carcharias) from above. Guadalupe Island, Baja California, Mexico. East Pacific Ocean

Alex Mustard / Great white sharks (Carcharodon carcharias) males beneath the surface. Guadalupe Island, Baja California, Mexico. East Pacific Ocean

Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) portrait, captive. Kona, Hawaii. Central Pacific Ocean.

Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) portrait, captive. Kona, Hawaii. Central Pacific Ocean. Digitally manipulated image.

Chris & Monique Fallows / Mako shark (Isurus oxyrinchus) near surface, Cape Point, South Africa, March 2015

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) predating Cape fur seal (Arctocephalus pusillus) Seal Island, False Bay, South Africa, July. Sequence 3 of 3

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) split level view, New Zealand, March.

Alex Mustard / Great hammerhead shark (Sphyrna mokarran) female at night with Bar jacks (Caranx ruber), South Bimini, Bahamas. The Bahamas National Shark Sanctuary. Gulf Stream, West Atlantic Ocean.

Alex Mustard / Great hammerhead shark (Sphyrna mokarran) swimming over a sandy seabed, accompanied by Rainbow runners (Elagatis bipinnulata) South Bimini, Bahamas. The Bahamas National Shark Sanctuary. Gulf Stream,...

Alex Mustard / Whitetip shark (Carcharhinus longimanus) head on beneath the surface. Rocky Island, Egypt. Red Sea

Jordi Chias / Spotted catshark (Scyliorhinus canicula) just hatched from egg case that is on Seafan (Paramuricea clavata), Ullastres seamount, Costa Brava, Llafranch, Catalunya, Spain

Jordi Chias / Angular roughshark (Oxynotus centrina) a deepsea species living at 80-300m depth, caught by fishermen and released, Costa Brava, Catalunya, Spain, Mediterranean Sea

Jordi Chias / Split level view of Blue shark (Prionace glauca) at surface at sunset, Azores Islands, Portugal, Atlantic Ocean

Jordi Chias / Giant Manta (Manta birostris) with Remoras (Remora brachyptera) attached to both wings, offshore Santa Maria Island, Azores, Atlantic Ocean

Jordi Chias / Mobula / Chilean devil ray (Mobula tarapacana) with remora (Remora brachyptera) and Amberjacks (Serila dumerilli) Santa Maria Island, Azores, Atlantic Ocean

Pete Oxford / Nurse Shark (Ginglymostoma cirratum) Hol Chan Marine Reserve, Belize Barrier Reef, Belize.

Pete Oxford / Whale Shark (Rhincodon typus) feeding at Bagan (floating fishing platform), Cenderawasih Bay, West Papua, Indonesia. Winner of the Man and Nature Portfolio Award in the Terre Sauvage Nature Images Aw...

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

Pete Oxford / Whale shark (Rhincodon typus) front view portrait, 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 scuba divers seen from below, Cenderawasih Bay, West Papua. Indonesia.

Pete Oxford / Whale shark (Rhincodon typus) and scuba divers seen from below, Cenderawasih Bay, West Papua. Indonesia. Winner of the Man and Nature Portfolio Award in the Terre Sauvage Nature Images Awards Competit...

Pete Oxford / Whale shark (Rhincodon typus) Cenderawasih Bay, West Papua. Indonesia.

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) accompanied by pilotfish (Naucrates ductor) as it cruises beneath the surface of the Red Sea, close to Little Brother Island. The Brothers Islands, Egy...

Alex Mustard,Alex Mustard / Whaleshark (Rhincodon typus) swimming and filtering fish eggs from the water. A behaviour known as ram-feeding. Isla Mujeres, Quintana Roo, Yucatan Peninsular, Mexico. Caribbean Sea.

Pascal Kobeh / Zebra / Leopard shark (Stegostoma varium) swimming away from the bottom, New Caledonia, Pacific Ocean.

Alex Mustard / Blacktip reef sharks (Carcharhinus melanopterus) circling over a shallow coral garden (Acropora spp.). Misool, Raja Ampat, West Papua, Indonesia. Misool Marine Protected Area. Ceram Sea. Tropical West...

Alex Mustard / Reef manta (Mobula alfredi) visiting a cleaning station on a coral reef with a school of Onespot snappers (Lutjanus monostigma), Oriental sweetlips (Plectorhinchus vittatus) and Sabre squirrelfish (Sa...

Sergio Hanquet / Smalltooth sand tiger shark (Odontaspis ferox), view from below. El Hierro. Canary Islands.

Sergio Hanquet / Blue shark (Prionace glauca). Canary Islands. North Atlantic Ocean.

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

Shane Gross / Caribbean reef shark (Carcharhinus perezi) patrolling coral reef with Schoolmaster snapper (Lutjanus apodus) and other fish. Caribbean Sea off Gardens of the Queen National Park, Cuba.

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...

Shane Gross / Southern stingray (Dasyatis americana) feeding in soft sand while a bar jack (Caranx ruber) waits to eat scraps. Eleuthera, Bahamas.

Nick Hawkins / Blue shark (Prionace glauca) with pilot fish (Naucrates ductor) off Halifax, Nova Scotia, Canada. July.

Nick Hawkins / Blue shark (Prionace glauca) with a pair of pilot fish (Naucrates ductor) off Halifax, Nova Scotia, Canada. July.

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

David Fleetham / Oceanic whitetip shark (Carcharhinus longimanus) with Pilot fish (Naucrates ductor) and Remora (Echeneididae). In open ocean several miles off The Big Island / Hawaii, Hawaii.

Nick Hawkins / Blue shark (Prionace glauca) with Pilot fish (Naucrates ductor) off Halifax, Nova Scotia, Canada. July.

Nick Hawkins / Blue shark (Prionace glauca) with Pilot fish (Naucrates ductor) off Halifax, Nova Scotia, Canada. July.

Alex Mustard / Group of southern stingrays (Dasyatis americana) forage over seagrass in shallow water, accompanied by bar jacks (Caranx ruber). The Sandbar, Grand Cayman, Cayman Islands. British West Indies. Caribbe...

Alex Mustard / Whitetip shark (Carcharhinus longimanus), accompanied by Pilotfish (Naucrates ductor), swims towards the camera as it cruises beneath the surface of the Red Sea, close to Little Brother Island. The Br...

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) is accompanied by pilotfish (Naucrates ductor) as it cruises beneath the surface of the Red Sea, close to Little Brother Island. The Brothers Islands N...

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 / 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...

Franco Banfi / Nurse shark (Ginglymostoma cirratum) using pectoral fins to walk along the seabed, with Bar jacks (Caranx rubus) nearby, South Bimini, Bahamas. The Bahamas National Shark Sanctuary, West Atlantic Ocea...

Franco Banfi / Nurse sharks (Ginglymostoma cirratum) resting on sandy seabed with Bar jacks (Caranx ruber), South Bimini, Bahamas. The Bahamas National Shark Sanctuary, West Atlantic Ocean.

Franco Banfi / Nurse sharks (Ginglymostoma cirratum) on a sandy seabed with Bar jacks (Caranx ruber) and Remora fish, South Bimini, Bahamas. The Bahamas National Shark Sanctuary, West Atlantic Ocean.

Franco Banfi / Great hammerhead shark (Sphyrna mokarran) swimming over sandy seabed with resting Nurse sharks (Ginglymostoma cirratum), Bar jacks (Caranx ruber) and Remora fish, South Bimini, Bahamas. The Bahamas Na...

Franco Banfi / Great hammerhead shark (Sphyrna mokarran) swimming over sandy seabed near resting Nurse sharks (Ginglymostoma cirratum), Bar jacks (Caranx ruber) and Remora fish, South Bimini, Bahamas. The Bahamas Na...

Georgette Douwma / Thresher shark (Alopias pelagicus) swimming over seabed to be cleaned by cleaner wrasses, Cebu, Malaspascua, Philippines, September

Alex Mustard / Southern stingrays (Hypanus americanus) large female and two smaller males forage over seagrass in shallow water, accompanied by Bar jacks (Caranx ruber) The Sandbar, Grand Cayman, Cayman Islands. Bri...

Mark Carwardine / Munk's mobula ray / devilray (Mobula munkiana) leaping out of the water, Sea of Cortez, Gulf of California, Baja California, Mexico, Pacific Ocean, April

Mark Carwardine / Munk's mobula ray / devilray (Mobula munkiana) leaping out of the water, Sea of Cortez, Gulf of California, Baja California, Mexico, Pacific Ocean, April

Mark Carwardine / Munk's mobula ray / Devilray (Mobula munkiana) leaping out of the water, Sea of Cortez, Gulf of California, Baja California, Mexico, February

Tony Wu / Whitespotted bamboo shark (Chiloscyllium plagiosum) male biting the pectoral fin of a female shark during courtship, Kannoura, Shikoku, Kochi-ken, Japan

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) profile portrait, off the West Coast of Auckland, New Zealand, February

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) head on just below surface, off the West Coast of Auckland, New Zealand, February

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) seen just below surface at dusk, off the East Coast of Auckland, New Zealand, June 2015

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) just below surface, off the East Coast of Auckland, New Zealand, May

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) with Pilot fish (Naucrates ductor) Guadalupe Island, Mexico. Small repro only.

Doug Perrine / Reef manta ray (Manta alfredi) feeding on plankton attracted by light at night, among schooling Hawaiian flagtail (Kuhlia xenura) akako Bay, Keahole, Kona, Hawaii. August.

Franco Banfi / River stingray (Potamotrygon sp) Formoso River, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Silky shark (Carcharhinus falciformis) San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Giant manta ray (Manta birostris) seen from below, El Boiler dive place, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Giant manta ray (Manta birostris) with scuba diver below, El Boiler dive place, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Pascal Kobeh / Whale sharks (Rhincodon typus) gather around small fishing boats in the morning as local fishermen feed them shrimp, watched by tourists, Oslob, Sulu Sea, Philippines

Pascal Kobeh / Whale shark (Rhincodon typus) gather around small fishing boats in the morning as local fishermen feed them shrimp, watched by tourists, Oslob, Sulu Sea, Philippines

Alex Mustard / Southern stingrays (Hypanus americanus) swimming over a sand bar in the early morning. Grand Cayman, Cayman Islands. British West Indies. Caribbean Sea.

Alex Mustard / Great hammerhead shark (Sphyrna mokarran) portrait, South Bimini, Bahamas. The Bahamas National Shark Sanctuary. Gulf Stream, West Atlantic Ocean.

Chris & Monique Fallows / Cape fur seal (Arctocephalus pusillus), feeding on striped catshark (Poroderma africanum), False Bay, Cape Town, South Africa, July 2014

Chris & Monique Fallows / Blue shark (Prionace glauca) group of three, Cape Point, South Africa, February.

Chris & Monique Fallows / Blue shark (Prionace glauca), Cape Point, South Africa, February.

Chris & Monique Fallows / Bronze whaler shark (Carcharhinus brachyurus), caught in traditional seine net and released by fisherman, Muizenberg beach, Cape Town, South Africa, January.

Chris & Monique Fallows / Bronze whaler shark (Carcharhinus brachyurus), caught in traditional seine net and released by fisherman, Muizenberg beach, Cape Town, South Africa, January 2014

Chris & Monique Fallows / Blue shark (Prionace glauca), feeding on anchovy baitball, Cape Point, South Africa, January.

Chris & Monique Fallows / Great white sharks (Carcharodon carcharias) with fins at water's surface at sunset, with birds in the background, Gansbaai, South Africa, July.

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) approaching kayaker, aerial view, Mossel Bay, South Africa, December 2010

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) leaping out of water to predate seal, Seal Island, False Bay, South Africa, July.

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) cruising through water,. This individual is accompanied by a group of Pilotfish (Naucrates ductor), mostly out of frame. Little Brother Island, Egypt....

Jordi Chias / Grey reef sharks (Carcharhinus amblyrhynchos) in the south pass of Fakarava Tuamotus, French Polynesia, South Pacific

Jordi Chias / Mobula / Chilean devil ray (Mobula tarapacana) with a school of fish (Capros aper) showing vertical migration, Santa Maria, Azores, Portugal, Atlantic Ocean

Jordi Chias / Blue shark (Prionace glauca) seen from above with pilot fish, Azores Islands, Portugal, Atlantic Ocean

Jordi Chias / Reef manta (Manta alfredi) mouth open feeding at night, South Ari atoll, Maldives, Indian Ocean

Jordi Chias / Chilean devil rays / Mobulas (Mobula tarapacana) offshore Santa Maria, Azores, Portugal, Atlantic Ocean