Gentoo penguin (Pygoscelis papua) breeding colony, outside refuge hut, at Petermann Island, Antarctica, Southern Ocean, Polar Regions

Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

Adult black-browed albatross (Thalassarche melanophrys), in flight returning to nesting site on West Point Island, Falklands, South America

Northern giant petrel (Macronectes halli) threat display on the beach at Stromness, South Georgia, Southern Ocean, Polar Regions

Adult black-legged kittiwakes (Rissa tridactyla) resting on ice in the Svalbard Archipelago, Barents Sea, Norway, Arctic, Europe

View of Welome sign and signpost on Tristan da Cunha, the most remote inhabited location on Earth, Tristan da Cunha, South Atlantic Ocean

King penguin (Aptenodytes patagonicus) breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

Black-browed albatross (Thalassarche melanophrys) adult feeding chick at nesting site on West Point Island, Falkland Islands, South America

Black-browed albatross (Thalassarche melanophrys) breeding colony on Steeple Jason Island in the Falkland Islands

Black-browed albatross (Thalassarche melanophrys) breeding colony on Carcass Island in the Falkland Islands

Adult rockhopper penguins (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands

Offshore type bottlenose dolphins (Tursiops truncatus) surfacing near Porto Novo, Santo Antao, Cape Verde Islands, Atlantic Ocean

Offshore type bottlenose dolphins (Tursiops truncatus) surfacing near Porto Novo, Santo Antao, Cape Verde Islands, Atlantic Ocean

Southern Giant Petrels (Macronectes giganteus) attacking and eventually killing an imperial rock shag (Phalacrocorax atriceps) on a tiny offshore reef in the Beagle Channel outside Ushuaia, Argentina

Offshore type bottlenose dolphins (Tursiops truncatus) surfacing near Porto Novo, Santo Antao, Cape Verde Islands, Atlantic Ocean

Southern Giant Petrels (Macronectes giganteus) attacking and eventually killing an imperial rock shag (Phalacrocorax atriceps) on a tiny offshore reef in the Beagle Channel outside Ushuaia, Argentina

Southern Giant Petrels (Macronectes giganteus) attacking and eventually killing an imperial rock shag (Phalacrocorax (atriceps) atriceps) on a tiny offshore reef in the Beagle Channel outside Ushuaia, Argentina

Offshore type bottlenose dolphins (Tursiops truncatus) bow-riding in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) bow-riding in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) leaping in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) surfacing in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) surfacing in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) surfacing in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) leaping in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.

Offshore type bottlenose dolphins (Tursiops truncatus) bow-riding in the midriff region of the Gulf of California (Sea of Cortez), Baja California Norte, Mexico.