Couple at front of boat, man jumping in water, Maldives, Indian Ocean, Asia

Hawksbill sea turtle, Kimbe Bay, Papua New Guinea, Pacific

Close-up head on view of a hawksbill sea turtle (Eretmochelys imbricata), Bunaken National Park, Sulawesi, Indonesia, Southeast Asia, Asia

Close-up view of a Hawksbill sea turtle next to a red sea fan on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Close-up view of the underside of a Hawksbill sea turtle, complete with barnacles, on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Woman walking with snorkelling equipment to Rihiveli island, Maldives, Indian Ocean, Asia

Girl snorkeling in The Maldives, Indian Ocean, Asia

A hawksbill turtle (Eretmochelys imbricata), swims over a reef in the Pacific Ocean, Philippines, Southeast Asia, Asia

Green sea turtles (Chelonia mydas), an endangered species, Hawaii, United States of America, Pacific, North America

Green sea turtles (Chelonia mydas), gather at a cleaning station off West Maui, Hawaii, United States of America, Pacific, North America

A green sea turtle (Chelonia mydas) makes its way to the surface off Maui, Hawaii, United States of America, Pacific, North America

Woman snorkelling at Olhuveli Beach and Spa Resort, South Male Atoll, Kaafu Atoll, Maldives, Indian Ocean, Asia

Woman snorkelling at Olhuveli Beach and Spa Resort, South Male Atoll, Kaafu Atoll, Maldives, Indian Ocean, Asia

Grey seal, Helgoland-Duene, Germany, Europe

Jumping Dolpnins, Tursiops truncatus, Indian Ocean, Maldives

Couple in the Maldives, Indian Ocean, Asia

Southern elephant seal bull, Mirounga leonina, Gold Harbour, South Georgia, South Atlantic Ocean

Weddell seal (Leptonychotes weddellii) hauled out on ice at Snow Island, South Shetland Islands, Antarctica, Southern Ocean, Polar Regions

Divers in Maldives, Indian Ocean, Asia

Curious young California sea lion (Zalophus californianus) with snorkeler underwater at Los Islotes, Baja California Sur, Mexico, North America

Hawksbill Sea Turtle belly, Australia.

A young humpback whale, Megaptera novaeangliae, breaches out of the blue waters of the Caribbean Sea.

A loggerhead sea turtle, Caretta caretta, swims over a deep coral reef on Turneffe Atoll, Belize.

A hawksbill turtle glides through the water on a sunny day.

A green sea turtle pauses from eating sea grass to gaze up at its surroundings, Red Sea.

Hawksbill sea turtle (Eretmochelys imbricata) swimming in the Red Sea.

Sea lion blowing bubbles, Los Islotes, La Paz, Mexico.

Pair of playful sea lions, Los Islotes, La Paz, Mexico.

Guadalupe fur seal (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Guadalupe fur seal (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Guadalupe fur seal (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Guadalupe fur seal (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

A green sea turtle (Chelonia mydas) in the sea grass, Saint Croix, U.S. Virgin Islands.

A feeding hawksbill sea turtle in Cozumel, Mexico.

Hawksbill sea turtle, Nassau, The Bahamas.

A Black Sea Turtle (Chelonia mydas agassizi) with a remora trying to attach, swims through a school of fish in the clear South Pacific ocean near Tavarua Island off the coast of Liti Levu, Fiji.

A Black Sea Turtle (Chelonia mydas agassizi) swims in the clear South Pacific ocean off the coast of Tavarua Island, Fiji in March 2012.

A large Lemon Shark gulps down a large tuna head in front of a crowd of divers, Fiji.

The hawksbill sea turtle (Eretmochelys imbricata) swims in the waters off the coast of Bonaire, Caribbean Netherlands. The hawksbill is a critically endangered sea turtle belonging to the family Cheloniidae.

The hawksbill sea turtle (Eretmochelys imbricata) swims in the waters off the coast of Bonaire, Caribbean Netherlands. The hawksbill is a critically endangered sea turtle belonging to the family Cheloniidae.

Scuba diver uses a diver propulsion vehicle to navigate the waters off the coast of Bonaire, Caribbean Netherlands.

Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, feeding on soft coral, side view, South Ari Atoll, Maldives.

Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, frontal view, South Ari Atoll, Maldives.

Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, frontal view, South Ari Atoll, Maldives.

Close-up view of a green turtle (Chelonia mydas) resting on a reef top in Komodo National Park, Indonesia.

A green turtle (Chelonia mydas) swimming in Komodo National Park, Indonesia.

A diver swims over a Komodo reef with a hawksbill sea turtle off of Indonesia.

Divers hovering above a large pink barrel sponge, Indonesia.

Green sea turtle (Chelonia mydas) resting on a plate coral, North Sulawesi, Indonesia.

Green sea turtle (Chelonia mydas) on a ledge with a red gorgonian sea fan, North Sulawesi, Indonesia.

Hawksbill Sea Turtle in mid-water in the Caribbean Sea.

Snorkeler photographing Green Turtle in Caribbean Sea near Cancun Mexico.

Hawksbill sea turtle (Eretmochelys imbricata), eating fisherman scraps, Curacao.

A snorkeler approaches a hawksbill sea turtle (Eretmochelys imbricata), feeding on fisherman scraps in the sand, Curacao.

Killer whale female (Orcinus orca), tail-lobbing off Isla San Lorenzo, Baja California, Sea of Cortez, Mexico, North America

Adult king penguins (Aptenodytes patagonicus), flipper slapping at Salisbury Plain, South Georgia, South Atlantic, Polar Regions

Guadalupe fur seals (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

A pair of long-beaked common dolphins (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

Guadalupe fur seals (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Grey seal pup (Halichoerus grypus) chewing a flipper while lying on a sandy beach, Norfolk, England, United Kingdom, Europe

Flippers, North Male Atoll, Maldives, Indian Ocean, Asia

Guano in an Adelie Penguin, Pygoscelis adeliae, colony at Madder Cliffs, Suspiros Bay, at the west end of Joinville Island, Antarctica. Adelie's are a true Antarctic species which are suffering as a result of climate change, The Antarctic Peninsular, their only breeding grounds, is one of the fastest warming areas on the planet. This is causing Adelies to migrate south. They are reducing in numbers, they feed almost exclusively on Krill, which is also declining as a result of climate change.

Southern Elephant Seal; Mirounga leonina, on Prion Island, South Georgia, Antarctica, yawning,

Southern Elephant Seal; Mirounga leonina, in Grytviken South Georgia, Antarctica, with an old whaling ship behind.

A massive bull, beach master Southern Elephant Seal; Mirounga leonina, at Jason Harbour, South Georgia, Antarctica.

Antarctic Fur Seal pups at Salisbury Plain, South Georgia, Southern Ocean.

A Bull Antarctic Fur Seal (Arctocephalus gazella) at Salisbury Plain, South Georgia, Southern Ocean, showing a threat display.

Southern Elephant Seal; Mirounga leonina, on Prion Island, South Georgia, Antarctica.

Large bull Southern Elephant Seal; Mirounga leonina, fighting at Gold Harbour, South Georgia, Antarctica, in a King Penguin colony.

Antarctic Fur Seal pups at Salisbury Plain, South Georgia, Southern Ocean.

Southern Elephant Seals; Mirounga leonina, at Hannah Point, on livingston Island in the South Shetland Islands off the Antarctica Peninsular.

A female Antarctic Fur Seal (Arctocephalus gazella) at Salisbury Plain, South Georgia, Southern Ocean, with a zodiak full of passengers from an expedition cruise.

A massive bull, beach master Southern Elephant Seal; Mirounga leonina, at Jason Harbour, South Georgia, Antarctica, with tourists from an expedtion cruise ship.

A Bull Antarctic Fur Seal (Arctocephalus gazella) on an iceberg in Drygalski Fjord, Antarctic Peninsular,

A Gentoo Penguin on Prion Island, South Georgia.

A Chinstrap Penguin, Pygoscelis antarctica, at Hannah Point on Livingston Island in the South Shetland Islands, Antarctic. Behind the penguin is lots of greenery, plants that are expanding as the Antarctic Peninsular warms as a result of climate change,

Adelie Penguins, Pygoscelis adeliae at Madder Cliffs, Suspiros Bay, with tourists from an expedition cruise, at the west end of Joinville Island, Antarctica.

An African penguin, also known as a Black-footed penguin and formerly the Jackass penguin (Spheniscus demersus) on a beach in Cape Town.

Grey whale (eschrishtius robustus) showing flipper above water, heavy scarring, san ignacio, mexico

A female Antarctic Fur Seal (Arctocephalus gazella) at Salisbury Plain, South Georgia, Southern Ocean.

Antarctic Fur Seal pups at Salisbury Plain, South Georgia, Southern Ocean.

A female Antarctic Fur Seal (Arctocephalus gazella) on Prion Island, South Georgia, Southern Ocean, and a wildlife photographer.

Steering with its pectoral fins the friendly Minke whale (Balaenoptera acutorostrata) turns its streamlined body towards the boat in order to dive under the hull. St. Lawrence estuary, Canada. Sequence 5/6

The white flipper band of a Minke whale (Balaenoptera acutorostrata) is visible through the greenish water. This distinctive feature is characteristic of Minke whales of the northern hemisphere and the most obvious difference to their relatives in the Antarctic. St. Lawrence estuary, Canada

The distinctive colouration pattern of a Minke whale (Balaenoptera acutorostrata). Note that the typical white flipper band extends on to the lower side of the pectoral fin. St. Lawrence estuary, Canada (RR)

Very slowly, a curious Minke whale (Balaenoptera acutorostrata) surfaces spreading its pectoral fins perpendicular to its body. St. Lawrence estuary, Canada

Even in conditions with little visibility, the white flipper band of a Minke whale (Balaenoptera acutorostrata) shines through the water of the St. Lawrence estuary, Canada

A mother and newborn pup leopard seal (Hydrurga leptonyx) hauled out on ice floes on the western side of the Antarctic peninsula, Southern Ocean

A mother and newborn pup leopard seal (Hydrurga leptonyx) hauled out on ice floes on the western side of the Antarctic peninsula

California sea lion (Zalophus californianus) biting swim fins underwater at Los Islotes (the islets) just outside of La Paz, Baja California Sur in the Gulf of California (Sea of Cortez), Mexico.

Leaping dolphin pair (rr)

Lone adult king penguin (Aptenodytes patagonicus) among colonies of both gentoo and chinstrap penguins on Barrentos Island, Aitcho Island Group, South Shetland Islands, Antarctica

Adult Southern Rockhopper Penguins (Eudyptes chrysocome chrysocome) in the Falkland Islands. This is the smallest yellow-crested, black-and-white penguin in the genus Eudyptes. It reaches a length of 45-58 cm (18-23 in) and typically weighs 2-3.4 kg (4.4-7.5 lb), although there are records of exceptionally large rockhoppers weighing 5 kg (11 lbs). Their common name refers to the fact that unlike many other penguins which negotiate obstacles by sliding on their bellies or by awkward climbing using their flipper-like wings as aid, Rockhoppers will try to jump over boulders and across cracks. This behavior is by no means unique to this species however - at least the other "crested" penguins of the genus Eudyptes hop around rocks too. Southern Rockhopper Penguins have a global population of roughly 1 million pairs, perhaps a bit more. About two-thirds of the global population belongs to E. c. chrysocome which breeds on the Falkland Islands and on islands off Argentina and southern Chile. The Southern Rockhopper Penguin is classified as Vulnerable species by the IUCN.

Newborn southern elephant seal (Mirounga leonina) on the beach at President Head on Snow Island in the South Shetland Island Group, Antarctica

Minke whale (Balaenoptera acutorostrata) at the surface to breath with blow hole open. Characteristic white bands on the flipper visible thorugh the water. Hebrides, Scotland (1 of 2 images).

Common dolphins (Delphinus delphis) surfacing at speed in very calm waters. Eye, beak, flipper and dorsal fin visible above the surface. Hebrides, West coast of Scotland.

Minke whale (Balaenoptera acutorostrata) surfacing towards the camera with characteristic white bands on each flipper visible through the water. Hebrides, Scotland

Fin Whale side fluke

Minke whale (Balaenoptera acutorostrata) at the surface to breath with blow hole open. Characteristic white bands on the flipper visible thorugh the water. Hebrides, Scotlan

Common Bottlenose Dolphin, Tursiops truncatus, breaching right in front of the photographer. Note the scar above the right pectoral flipper which has been caused by the Remora. Costa Rica, Pacific Ocean.