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...

Shane Gross / Nurse sharks (Ginglymostoma cirratum) two in a courtship dance at sunrise in a mangrove area near Eleuthera, Bahamas.

Alex Mustard / Remoras (Remora sp.) hitchhiking on the tail of a large (13-15m) female whale shark (Rhincodon typus) swims in open water. Wolf Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean.

David Fleetham / Whale shark (Rhincodon typus), a commercial encounter for tourists with feeder above on canoe. Oslob, Cebu, Philippines. April 2017.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) group, individuals circling each other at dusk. Vavuu Atoll, Maldives. Indian 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) with scuba diver, 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.

Claudio Contreras / Whale shark (Rhincodon typus) feeding view of tail, Isla Mujeres, Caribbean Sea, Mexico, August. Vulnerable species.

Claudio Contreras / Whale shark (Rhincodon typus) backlit, Isla Mujeres, Caribbean Sea, Mexico, August. Vulnerable species.

Franco Banfi / Snorkelers swimming with Whale shark (Rhincodon typus) Santa Maria Island, Azores, Portugal, Atlantic Ocean

Juergen Freund / Whale shark (Rhincodon typus) split level view, Cenderawasih Bay, West Papua, Indonesia. Second Place in the Portfolio Award of the Terre Sauvage Nature Images Awards Competition 2015.

Alex Mustard / Nurse shark (Ginglymostoma cirratum) young caught in a fishtrap. North Sound, Grand Cayman, Cayman Islands. Caribbean Sea.

Alex Mustard / Tasseled wobbegong shark (Eucrossorhinus dasypogon) yawning. Citrus Ridge, Yanggefo Island, Gam Island, Raja Ampat, West Papua, Indonesia.

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.

Juergen Freund / Whale shark (Rhincodon typus) near a fishing device called ?Bagan?, a stationary outrigger boat, with a net between outriggers and strong light at night to attract anchovies and scad. The whale sharks...

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

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

David Hall / Brownbanded bamboo shark (Chiloscyllium punctatum) juvenile on sea floor. Pantar Island, Alor Archipelago, Indonesia.

Rick Price / Tawny nurse shark (Nebrius ferrugineus) at water surface. Talbot Bay, The Kimberley, Western Australia.

Rick Price / Tawny nurse shark (Nebrius ferrugineus) below water surface. Talbot Bay, The Kimberley, Western Australia.

Shane Gross / Brown banded bamboo shark (Chiloscyllium punctatum) rests on a pristine coral reef, near Alor, Indonesia.

Alex Mustard / Whale shark (Rhincodon typus) swimming through sun beams. This individual was following blue whales around to feed on their faeces. Indian Ocean, off Sri Lanka

Pascal Kobeh / Whale sharks (Rhincodon typus) swimming with diver, Sulu Sea, Philippines.

Pascal Kobeh / Whale sharks (Rhincodon typus) swimming with diver, Sulu Sea, Philippines.

David Perpinan / Anesthesia of a captive bamboo shark (Chiloscyllium plagiosum) Small repro only

Shane Gross / Nurse shark (Ginglymostoma cirratum) male biting onto the pectoral fin of a female whilst mating, Eleuthera, Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) male biting onto the pectoral fin of a female whilst mating, Eleuthera, Bahamas.

Shane Gross / Nurse sharks (Ginglymostoma cirratum) ready to mate. Showing male claspers, which are used to channel semen into the female during mating, Eleuthera, Bahamas.

Shane Gross / Nurse sharks (Ginglymostoma cirratum) ready to mate. Showing male claspers, which are used to channel semen into the female during mating, Eleuthera, Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) two males bite onto the pectoral fins of a larger female while trying to mate with her, Eleuthera, Bahamas

Shane Gross / Nurse shark (Ginglymostoma cirratum) male biting onto the pectoral fin of a female whilst mating, Eleuthera, Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) male biting onto the pectoral fin of a female whilst mating, Eleuthera, Bahamas.

Shane Gross / Close up view of the eye of Nurse shark (Ginglymostoma cirratum) The Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) resting in shallow water at sunset to save energy for mating which will take place the next morning. Eleuthera, Bahamas.

Shane Gross / Nurse sharks (Ginglymostoma cirratum) three in a courtship dance at sunrise in a mangrove area near Eleuthera, Bahamas.

Shane Gross / Nurse sharks (Ginglymostoma cirratum) three in a courtship dance at sunrise in a mangrove area near Eleuthera, Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) resting near a coral reef and other fish like blue tangs in The Bahamas.

Shane Gross / Nurse sharks (Ginglymostoma cirratum) three in a courtship dance at sunrise in a mangrove area, Eleuthera, Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) juvenile hiding under the reef, The Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) pup, swimming in a mangrove forest. Bimini, Bahamas.

Shane Gross / Nurse shark (Ginglymostoma cirratum) hiding under a ship wreck in Caribbean sea off Cancun, Yucatan, Mexico.

Shane Gross / Nurse shark (Ginglymostoma cirratum) bites onto a female while mating in the shallows, with another male nearby. Eleuthera, Bahamas. Awarded in underwater category, Wildlife Photographer of the Year 2...

Franco Banfi / Nurse shark (Ginglymostoma cirratum) stealing fish from diver. Chinchorro Banks Biosphere Reserve, Quintana Roo, Yucatan Peninsula, Mexico. May 2015.

Franco Banfi / Nurse shark (Ginglymostoma cirratum) swimming over reef. Chinchorro Banks Biosphere Reserve, Quintana Roo, Yucatan Peninsula, Mexico.

Franco Banfi / Nurse shark (Ginglymostoma cirratum) swimming through coral reef. Chinchorro Banks Biosphere Reserve, Quintana Roo, Yucatan Peninsula, Mexico. May 2015.

Alex Mustard / Tawny nurse shark (Nebris ferrungineus) patrols a coral reef at night. Vavuu Atoll, Maldives. Indian Ocean

Alex Mustard / Large Whale shark (Rhincodon typus) swimming over a reef. Wolf Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean.

Stephane Granzotto / Whale shark (Rhincodon typus) lit by artificial lights, Tadjourah gulf, Republic of Djibouti.

Stephane Granzotto / Scuba diver filming Whale shark (Rhincodon typus) Tadjourah gulf, Republic of Djibouti.

Stephane Granzotto / Whale shark (Rhincodon typus) with scuba diver in the backgroundTadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Aerial view of Whale shark (Rhincodon typus) Tadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Whale shark (Rhincodon typus) and Manta ray (Manta birostris) during a sardine run, Yucatan, Mexico.

Stephane Granzotto / Whale shark (Rhincodon typus) with tracking tag, Tadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Whale shark (Rhincodon typus) with tracking tag, Tadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Snorkeller taking pictures of Whale shark (Rhincodon typus) with tracking tag, Tadjourah Gulf, Republic of Djibouti. December, 2017.

Stephane Granzotto / Scuba diver checking on Whale shark (Rhincodon typus) tracking tag, Tadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Whale shark (Rhincodon typus) with satellite tracking tag, Tadjourah Gulf, Republic of Djibouti. December 2017.

Stephane Granzotto / Scuba diver checking Whale shark (Rhincodon typus) tracking device, Tadjourah Gulf, Republic of Djibouti. December 2017.

Stephane Granzotto / Scuba diver tagging Whale shark (Rhincodon typus) Tadjourah Gulf, Republic of Djibouti. December 2017.

Stephane Granzotto / Whale shark (Rhincodon typus) at night, with artificial light, Tadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Whale shark (Rhincodon typus) Tadjourah Gulf, Republic of Djibouti.

Stephane Granzotto / Scuba divers tagging Whale shark (Rhincodon typus) whilst others film on underwater cameras. Tadjourah Gulf, Republic of Djibouti. December 2017.

Stephane Granzotto / Scuba diver with equipment to attach Whale shark (Rhincodon typus) tagging device. Tadjourah Gulf, Republic of Djibouti. December 2017.

Stephane Granzotto / Whale shark (Rhincodon typus) tagging device, Tadjourah Gulf, Republic of Djibouti. December 2017.

Stephane Granzotto / Whale shark (Rhincodon typus) at night with rays of light, Tadjourah Gulf, Republic of Djibouti.

Christophe Courteau / Whale shark (Rhincodon typus) and tourist, La Paz, Sea of Cortez (Gulf of California), Baja California, Mexico, February

Claudio Contreras / whale Shark (Rhincodon typus), IUCN Redlist Endangered, La Paz, Sea of Cortez (Gulf of California), Baja California, Mexico, February

Linda Pitkin / Whale shark (Rhincodon typus), with remoras (Echeneis naucrates), Mai Mai, between Triton Bay and Kaimana, West Papua, Indonesia

David Fleetham / Tasselled wobbegong (Eucrossorhinus dasypogon) close up of dermal denticles on skin. Indonesia.

David Fleetham / Tasselled wobbegong (Eucrossorhinus dasypogon) Raja Ampat, Indonesia.

Jeff Rotman / Zebra Shark (Stegostoma fasciatum) underside showing mouth, teeth, barbels, ampullae of Lorenzini (natural electrical detectors located in the heads of sharks and rays which are sensitive to the elect...

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) at night. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) at night. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Tawny nurse shark (Nebrius ferrugineus) group at night. Vavuu Atoll, Maldives. Indian Ocean.

Alex Mustard / Nurse shark (Ginglymostoma cirratum) with damaged jaw swimming over coral reef in evening. North Wall, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Jordi Chias / Whale shark (Rhincodon typus), south Ari Atoll, Maldives islands

Jordi Chias / Tawny nurse shark (Nebrius ferrugineus) Vaavu Atoll, Maldives, Indian Ocean.

Jordi Chias / Whale shark (Rhincodon typus), closing nictitating membrane, South Ari Atoll, Maldives Islands, Indian Ocean.

Alex Mustard / Whale shark (Rhincodon typus) botella 'bottle' feeding, by floating stationary, upright in the water and gulping in food, in the plankton rich, green waters of La Paz bay. La Paz, Baja California Sur,...

Alex Mustard / Head on view of the mouth of a whale shark (Rhincodon typus) botella 'bottle' feeding, by floating stationary, upright in the water and gulping in food, in the plankton rich, green waters of La Paz ba...

Alex Mustard / Whale sharks (Rhincodon typus) bottle feeding, by floating stationary, upright in the water and gulping in food, in the plankton rich, green waters of La Paz bay. La Paz, Baja California Sur, Mexico....

Alex Mustard / Whale shark (Rhincodon typus) ram feeding in very shallow, plankton rich waters of La Paz bay. La Paz, Baja California Sur, Mexico. Sea of Cortez, Gulf of California, East Pacific Ocean.

Claudio Contreras / Whale shark (Rhincodon typus) with motorboat cut scar, Bahia de los Angeles Biosphere Reserve, Gulf of California (Sea of Cortez), Mexico, July. Endangered species.

Claudio Contreras / Whale Shark (Rhincodon typus), Bahia de los Angeles Biosphere Reserve, Gulf of California (Sea of Cortez), Mexico, July. Endangered species.

Alex Mustard / Whale shark (Rhincodon typus) mouth open feeding at the surface, Isla Mujeres, Yucatan Peninsular, Mexico. Caribbean Sea.

Alex Mustard / Whale shark (Rhincodon typus) mouth open feeding at the surface, Isla Mujeres, Quintana Roo, Yucatan Peninsular, Mexico. Caribbean Sea.

Alex Mustard / Two Atlantic spotted dolphins (Stenella frontalis) hunting a school of palometa fish (Trachinotus goodei) that have surrounded a nurse shark (Ginglymostoma cirratum) for protection. South Bimini, Baha...

Alex Mustard / Close up portrait of the face of a Nurse shark (Ginglymostoma cirratum) resting on the sand in shallow water. Its barbels are clearly visible on its top lip. South Bimini, Bahamas. The Bahamas Nationa...