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Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean

Adult gentoo penguin (Pygoscelis papua) with minutes-old newly hatched chick at Gold Harbor on South Georgia

Adult gentoo penguin (Pygoscelis papua) with minutes-old newly hatched chick at Gold Harbor on South Georgia

Nurse sharks (Ginglymostoma cirratum), being fed in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Spotted eagle ray (Aetobatus narinari), Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult humpback whale (Megaptera novaeangliae) tail throw among feeding whales in Southeast Alaska, United States of America

Adult brown bears (Ursus arctos) feeding on humpback whale carcass, Scidmore Cut, Glacier Bay National Park, Alaska, United States of America

A juvenile killer whale (Orcinus orca) encountered off West Craycroft Island in Blackfish Sound, British Columbia, Canada

Two young polar bears (Ursus maritimus), disputing feeding rights on a fresh bearded seal kill near Spitsbergen, Svalbard, Norway

Adult female killer whale (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

Small pod of eight to ten 'Type A' Oceanic killer whales (Orcinus orca), hunting near Stanley, Falkland Islands, South America

Adult bull southern elephant seal (Mirounga leonina), skull on display at the Natural History Museum in Stanley, Falklands, South America

Views of the Catholic church at the Chilean research base Presidente Eduardo Frei Montalva, Antarctica, Southern Ocean, Polar Regions

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding, Southeast Alaska, United States of America, North America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Snow Pass, Alaska, United States of America, North America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Snow Pass, Alaska, United States of America, North America

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

Schooling yellow-tailed surgeonfish (Prionurus punctatus), underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

A myriad of hard and soft corals at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

A myriad of hard and soft corals at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

Guest from the Lindblad Expedition ship National Geographic Explorer holding up a block of ice in the Svalbard Archipelago, Norway, Arctic, Europe

View of massive die-off of black triggerfish on the beach on Ascension Island in the southern tropical Atlantic Ocean, South Atlantic Ocean

Antarctic fur seal pup (Arctocephalus gazella) on Prion Island in the Bay of Isles on South Georgia, Southern Ocean, Polar Regions

Views of the abandoned whaling station in Prince Olav Harbor on South Georgia, Southern Ocean, Polar Regions

Adult leopard seal (Hydrurga leptonyx) near Cuverville Island near the Antarctic Peninsula, Southern Ocean, Polar Regions

Icebergs and sea ice in the Weddell Sea on the eastern side of the Antarctic Peninsula during the summer months, Southern Ocean, Polar Regions

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

A small pod of killer whales (Orcinus orca) off the west coast of Isabela Island in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Antarctic tern (Sterna vittata) in brash ice near the Antarctic Peninsula, Antarctica, Southern Ocean, Polar Regions

Iceberg detail in and around the Antarctic Peninsula during the austral summer months, Southern Ocean, Antarctica, Polar Regions

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

Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina

Nurse sharks (Ginglymostoma cirratum), being fed in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of hard and soft corals at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia in the Southern Ocean, Polar Regions

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia, Polar Regions

Humpback whale (Megaptera novaeangliae) flukes-up dive in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

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

Adult Imperial Shag (Phalacrocorax (atriceps) atriceps) exhibiting intense breeding plumage, New Island, Falkland Islands

Southern Right Whale (Eubalaena australis) adult surfacing near Puerto Pyramides, Peninsula Valdez, Argentina

Southern right whale (Eubalaena australis) adult surfacing near Puerto Pyramides, Peninsula Valdez, Argentina

Southern elephant seal (Mirounga leonina) weaner pup head detail on the beach at Gold Harbour on South Georgia, Polar Regions

Adult male leopard seal (Hydrurga leptonyx) hauled out on ice in the Gullet near the Antarctic Peninsula, Antarctica, Polar Regions

Humpback whale (Megaptera novaeangliae) surfacing in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Magellanic penguin (Spheniscus magellanicus) at a breeding and molting site in Estancia San Lorenzo, Argentina

A small pod of pack Ice type B killer whales (Orcinus orca), just after making a Weddell seal kill in the Lemaire Channel, Antarctica, Polar Regions

Bottlenose dolphin (Tursiops truncatus), surfacing in Cabo Pulmo National Marine Park, Baja California Sur, Mexico,, North America

Killer whale pod (Orcinus orca), beside tourists in inflatables off Punta Colorada, Isla San Jose, Baja California Sur, Mexico, North America

Adult killer whales (Orcinus orca) near research boat in the Monterey Bay National Marine Sanctuary, California, United States of America, North America

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Tiger shark pup (Galeocerdo cuvier), at Hawaii Institute of Marine Biology, Kaneohe Bay, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pup (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pup (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Tiger shark pup (Galeocerdo cuvier) at Hawaii Institute of Marine Biology, Kaneohe Bay, Oahu, Hawaii, United States of America, Pacific

Research scientist Lori Davis holds hammerhead shark pup (Sphyrna lewini), Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pup (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pup (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Bottlenose dolphin (Tursiops truncatus) receives medical care from trainer, Marine mammal research center, Hawaii Institute of Marine Biology, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

False killer whale (Pseudorca crassidens) with sunscreen Marine Mammal Research Center, Hawaii Institute of Marine Biology, Oahu, Hawaii, United States of America, Pacific

orca/ killer whale (Orcinus orca) 'Luna' (L98), 5-year old lone male interacting with Ingrid Visser (photo by T. Hardie) in Nootka Sound, West Vancouver Island, Canada, North Pacific.

orca/ killer whale (Orcinus orca) 'Luna' (L98), 5-year old lone male interacting with Ed Thornburn in Nootka Sound, West Vancouver Island, Canada, North Pacific.

orca/ killer whale (Orcinus orca) 'Luna' (L98), 5-year old lone male interacting with people's feet in Nootka Sound, West Vancouver Island, Canada, North Pacific.

New Zealand Whale and Dolphin Trust working with Hectors dolphins (Cephalorhynchus hectori) Akaroa, South Island: New Zealand.

Sperm whale (Physeter macrocephalus / catodon) washed up dead with man standing by head for scale. North coast of Iceland.

Research scientist taking hook off hammerhead shark pup (Sphyrna lewini), Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scalloped hammerhead shark pups (Sphyrna lewini), kept for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Scientists and graduate student collecting hammerhead shark pups for research, Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Giant manta ray, Isla de la Plata Ecuador. Portrait shot of Manta birostris approaching camera. Pacific Ocean, Ecuador

Giant manta ray, Isla de la Plata Ecuador. Portrait shot of Manta birostris approaching camera. Pacific Ocean, Ecuador

CT measures (9'8") the lower right mandible (jawbone) of an adult bull Sperm Whale (Physeter macrocephalus) in the mid-riff region of the Gulf of California (Sea of Cortez), Mexico. Model released.

Research diver approaching manta birostris to record detail in research program, Project Elasmo. Pacific Ocean, Ecuador

Tank with hundreds of tilapia (Oreochromis mossambicus), Hawaii Institute of Marine Biology, Kaneohe, Oahu, Hawaii, United States of America, Pacific

Satellite Tag attached to Giant Manta Ray, Ecuador. The lines to the left indicate recent fishing damage. Pacific Ocean, Ecuador

Research diver approaching manta birostris to record detail in research program, Project Elasmo. Pacific Ocean, Ecuador