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Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize
A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize
Adult male green iguana (Iguana iguana), on New River near Lamanai, Belize
A pair of Mesoamerican sliders (Trachemys venusta), on New River near Lamanai, Belize
Rock art on a rock formation in Tigui, Tibesti Mountains, Chad
Northern (Steller) sea lion (Eumetopias jubatus) close-up eating a halibut in Southeastern Alaska, United States of America
Northern (Steller) sea lions (Eumetopias jubatus) hauled out on South Marble Island in Glacier Bay National Park, Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America
Adult bald eagle (Haliaeetus leucocephalus) perched in Sitka spruce tree, Southeast Alaska, United States of America
Northern (Steller) sea lions, (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America
Northern (Steller) sea lions (Eumetopias jubatus) hauled out on South Marble Island, Glacier Bay National Park, Alaska, United States of America
Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America
Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America
Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America
Adult humpback whale (Megaptera novaeangliae) tail throw among feeding whales in Southeast Alaska, United States of America
Adult brown bear (Ursus arctos) skeletal remains on Chichagof Island, Alaska, United States of America
Adult brown bear pair (Ursus arctos) exhibiting courtship behavior at Scidmore Cut in Glacier Bay National Park, Alaska, United States of America
Adult brown bear pair (Ursus arctos) mock-fighting at Scidmore Cut in Glacier Bay National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) shaking water from its fur near whale carcass in Glacier Bay National Park, Alaska, United States of America
A pod of Pacific white-sided dolphins (Lagenorhynchus obliquidens) bow-riding in Johnstone Strait, British Columbia, Canada
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
View from Park Service platform where adult brown bears (Ursus arctos) forage for salmon, Katmai National Park, Alaska, United States of America
Young brown bear (Ursus arctos) cubs watching mom hunt for salmon in the Brooks River, Katmai National Park, Alaska, United States of America
Adult male polar bear (Ursus maritimus), on multi-year ice floes off the eastern coast of Spitsbergen in the Svalbard, Norway
Adult polar bear (Ursus maritimus) in Holmabukta on the northwest coast of Spitsbergen in the Svalbard Archipelago, Norway
Young polar bear (Ursus maritimus), feeding on a fresh bearded seal kill near Monacobreen Glacier, Spitsbergen, Svalbard, Norway
Adult polar bear (Ursus maritimus) in Holmabukta on the northwest coast of Spitsbergen in the Svalbard Archipelago, Norway
Cheetah (Acinonyx jubatus) with a bloody face after feeding, Ndutu, Ngorongoro Conservation Area, Serengeti, Tanzania, East Africa, Africa
California sea lion bulls (Zalophus californianus), hauled out on a small islet off San Marcos Island, Sea of Cortez, Mexico, North America
Hamadryas baboon (Papio hamadryas), along the road from Massawa to Asmara, Eritrea, Africa
A lone adult male killer whale (Orcinus orca) encountered in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, Pacific Ocean, North America
Huge canyon at the Pre-Aksumite settlement of Qohaito (Koloe), Eritrea, Africa
Sunrise on king penguins (Aptenodytes patagonicus) at nesting and breeding colony at Salisbury Plain, South Georgia, Polar Regions
Adult king penguins (Aptenodytes patagonicus) returning from sea to the nesting colony at Salisbury Plain, South Georgia, Polar Regions
African wild dog (Lycaon pictus), Khwai, Okavango Delta, Botswana, Africa
Adelie penguin (Pygoscelis adeliae), feeding chick at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions
Nesting puffin pair, United Kingdom, Europe
Aerial of the Congo River, Mbandaka, Equateur province, Democratic Republic of Congo, Africa
Author Carl Safina photographing a pair of Magellanic penguins (Spheniscus magellanicus), Patagonia, Argentina, South America
Harbor seal (Phoca vitulina) hauled out on ice calved from South Sawyer Glacier, Southeast Alaska, United States of America, North America
Harbor seals (Phoca vitulina) hauled out on a submerged log in Misty Fjord National Monument, Southeast Alaska, United States of America, North America
A large pod of Gerlache Strait type B killer whales (Orcinus orca), traveling and socializing in Gerlache Strait, Antarctica, Polar Regions
A large stand of Arctic cotton (Eriophorum callitrix) in Franz Josef Land, Russia, Arctic Ocean, Eurasia
Humpback whale (Megaptera novaeangliae), surfacing off Half Moon Island in the South Shetland Island Group, Antarctica, Polar Regions
Adult leopard seal (Hydrurga leptonyx), hauled out on ice floe at Dorian Bay near the Antarctic Peninsula, Southern Ocean, Polar Regions
Southern elephant seals (Mirounga leonina), hauled out for their annual catastrophic molt (moult) on the beach at Snow Island, Antarctica, Polar Regions
Chinstrap penguins (Pygoscelis antarctica), ecstatic display at breeding colony at Half Moon Island, Antarctica, Polar Regions
Brunnich's guillemot (Uria lomvia) breeding and nesting site at Cape Fanshawe in the Svalbard Archipelago, Norway, Arctic, Europe
Common guillemot (Uria aalge) nesting on Bear Island (Bjornoya) in the Svalbard Archipelago, Norway, Arctic, Europe
Common guillemot (Uria aalge) nesting on Bear Island (Bjornoya) in the Svalbard Archipelago, Norway, Arctic, Europe
Views of the Vasilievbreen (Vasiliev Glacier), in Isbukta (Ice Bay) near the island of Spitsbergen in Svalbard, Norway, Arctic, Europe
Lava lizard (Microlophus spp) in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) swimming in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) with a lava lizard on top of its head, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Adult yellow warbler (Dendroica petechia aureola) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Adult green sea turtle (Chelonia mydas agassizii) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Adult Nazca booby (Sula grantii) pair in courtship in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Nazca booby (Sula grantii) downy chick stretching its wings to gather strength for flight in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
An adult Galapagos dove (Zenaida galapagoensis) on Espanola Island in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Galapagos sea lions (Zalophus wollebaeki) hauled out on Gardner Beach, Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Young Galapagos sea lion bulls (Zalophus wollebaeki) mock-fighting in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Weddell Seal (Leptonychotes weddellii), hauled out on ice at Half Moon Island, Antarctica, Southern Ocean, Polar Regions
Turtle on a beach, Bird Island, Republic of Seychelles, Indian Ocean, Africa
African elephant (Loxodonta africana) at waterhole, Nxai Pan National Park, Botswana, Africa
Adelie penguins (Pygoscelis adeliae), in snow storm at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions
Adelie penguins (Pygoscelis adeliae), in snow storm at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions
Adelie penguins (Pygoscelis adeliae), in snow storm at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions
Giraffe (Giraffa camelopardalis) drinking at sunset at a waterhole, Nxai Pan National Park, Botswana, Africa
Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America
Killer whale female calf (Orcinus orca), breaching at sunset off Isla San Jose, Baja California Sur, Sea of Cortez, 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
Adult elegant tern (Thalasseus elegans), looking for fish on Isla Carmen, Baja California Sur, Sea of Cortez, Mexico, North America
Adult macaroni penguins (Eudyptes chrysolophus) plunging into the sea leaving their breeding colony at Elsehul on South Georgia, Southern Ocean, Polar Regions
Adult male leopard seal (Hydrurga leptonyx) hauled out on ice in the Gullet near the Antarctic Peninsula, Antarctica, Polar Regions
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Colony of Peruvian Pelicans (Pelecanus thagus), Ballestas Islands, Paracas, Peru, South America
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Gentoo penguin (Pygoscelis papua) adult with chicks on Cuverville Island, Antarctica, Southern Ocean, Polar Regions
Gentoo penguin (Pygoscelis papua) chicks covered with mud and guano on Cuverville Island, Antarctica, Southern Ocean, Polar Regions
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Adult great blue heron (Ardea herodias cognata) at Cerro Dragon on Santa Cruz Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, Sputh America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Galapagos Land Iguana (conolophus subcristatus), a large lizard species, that can grow up to five feet long and live 60 years, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Lion pride (Panthera leo), Savuti, Chobe National Park, Botswana, Africa
Cheetah (Acynonix jubatus) walking, Savuti, Chobe National Park, Botswana, Africa
Magellanic penguin (Spheniscus magellanicus), Magdalena Island, Magallanes Region, Punta Arenas, Chile, South America
Humberstone Saltpeter Works, UNESCO World Heritage Site, northern Atacama, Chile, South America
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
By-the-wind sailors (Velella velella), floating by the hundreds on the surface of the sea outside Newport Beach, California, United States of America, North America
Antarctic fur seal pups (Arctocephalus gazella) mock-fighting on South Georgia, Southern Ocean, Polar Regions
Adult gentoo penguin (Pygoscelis papua) with minutes-old newly hatched chick at Gold Harbor on South Georgia
Example of the thick foliage and undercut islets, Palau, Micronesia, Pacific
Snorkeler with golden jellyfish (Mastigias papua etpisoni), in Jellyfish Lake, a marine lake located on Eil Malk island, Rock Islands, Palau, Micronesia, Pacific
Adult pied butcherbirds (Cracticus nigrogularis), taking flight in Vansittart Bay, Kimberley, Western Australia, Australia, Pacific