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A small pod of 8 Type B killer whales (Orcinus nanus) in pack ice near Snow Hill Island Island, Weddell Sea, Antarctica, Southern Ocean
Curious adult leopard seal (Hydrurga leptonyx) approaches Zodiac near Booth Island, Antarctica, Southern Ocean
Green sea turtle (Chelonia mydas) at cleaning station at Olowalu Reef, Maui, Hawaii, USA
Adult male green sea turtle (Chelonia mydas) in the protected marine sanctuary at Honolua Bay on the northwest side of the island of Maui, Hawaii, USA
Chinstrap penguin (Pygoscelis antarctica) colony at Baily Head on Deception Island, South Shetland Island Group, Antarctica
A very rare sighting of an adult blue Whale (Balaenoptera musculus) flukes-up dive off the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway
Adelie penguin (Pygoscelis adeliae) near the Antarctic Peninsula, Antarctica.
Adult humpback whale (Megaptera novaeangliae) surface lunge-feeding on krill near the Antarctic Peninsula, Antarctica, Southern Ocean
Adult Bryde's whale (Balaenoptera edeni) surface skim feeding on euphausids off Isla del Carmen, Gulf of California (Sea of Cortez), Baja California Sur, Mexico
Long-beaked common dolphin pod (Delphinus capensis) encountered in the southern Gulf of California (Sea of Cortez), Baja California Sur, Mexico
Long-beaked common dolphin pod (Delphinus capensis) encountered in the southern Gulf of California (Sea of Cortez), Baja California Sur, Mexico
Adult leopard seal (Hydrurga leptonyx) near the Antarctic Peninsula, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island in the Southern Ocean
Crabeater seal (Lobodon carcinophaga) hauled out on ice floe near the Antarctic Peninsula, Antarctica
Molting gentoo penguin (Pygoscelis papua) feather detail in Antarctica
Adult macaroni penguins (Eudyptes chrysolophus) plunging into the sea leaving their breeding colony at Elsehul on South Georgia, Southern Ocean
Spotted eagle ray (Aetobatus narinari) underwater at Leon Dormido (Sleeping Lion) Island off San Cristobal Island in the Galapagos Island Archipelago, Ecuador
Adult Peale's Dolphin (Lagenorhynchus australis) bow-riding in the Falkland Islands, South Atlantic Ocean
Adult male walrus (Odobenus rosmarus rosmarus) on ice floes near Moffen Island, Barents Sea, Norway
Sub-adult bull California sea lions (Zalophus californianus) mock-fighting on Los Islotes, Gulf of California (Sea of Cortez), Baja California Sur, Mexico
Adult male walrus (Odobenus rosmarus rosmarus) on multi-year ice floes off Bolshoy Island, Barents Sea, Norway
Adult Antarctic Fur Seal (Arctocephalus gazella) killing and then eating a king penguin on the island of South Georgia, southern Atlantic Ocean
Green sea turtle (Chelonia mydas) at cleaning station at Olowalu Reef, Maui, Hawaii, USA
Underwater scenes from the Galapagos Island Archipelago, Ecuador
Gentoo penguin parent (Pygoscelis papua) with chicks in Antarctica, Southern Ocean
Curious northern (Steller) sea lion (Eumetopias jubatus) colony in Inian Pass near Cross Sound, southeastern Alaska
Curious harbor seal (Phoca vitulina) approaches the Zodiac at Vigur Island in Iceland
Adult male walrus (Odobenus rosmarus rosmarus) on multi-year ice floes off Bolshoy Island, Barents Sea, Norway
Humpback whale (Megaptera novaeangliae) surfacing near Zodiac near the Antarctic Peninsula, Antarctica, Southern Ocean
Curious northern (Steller) sea lion (Eumetopias jubatus) colony in Inian Pass near Cross Sound, southeastern Alaska
Excited whale watchers on shore see all three resident killer whale (Orcinus orca) pods off Lime Kiln lighthouse, San Juan Island, Washington State, USA
Young Galapagos sea lion (Zalophus wollebaeki) catching and eventually eating a Sally Lightfoot crab (Grapsus grapsus) in the Galapagos Island Group, Ecuador. Pacific Ocean.
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
Humpback whale (Megaptera novaeangliae) flukes-up dive near the Antarctic Peninsula, Antarctica, Southern Ocean
Adult humpback whale (Megaptera novaeangliae) surfacing in the late evening at Siglufjordur, Iceland
A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Island Archipelago, Ecuador
A rare sighting of a lone adult king penguin (Aptenodytes patagonicus), Barrentos Island, South Shetland Islands, Antarctica, Southern Ocean
An adult humpback whale (Megaptera novaeangliae) head-lunging off Point Adolphus in Icy Strait in Southeast Alaska, USA. Pacific Ocean
Adult emperor penguin (Aptenodytes forsteri) on sea ice near Snow Hill Island in the Weddell Sea, Antarctica.
Hawaiian Spinner Dolphin (Stenella longirostris) spinning, possibly to dislodge attached remoras, Lanai, Hawaii, USA, Pacific Ocean
Young Galapagos sea lion (Zalophus wollebaeki) catching and eventually eating a Sally Lightfoot crab (Grapsus grapsus) in the Galapagos Island Group, Ecuador. Pacific Ocean.
Curious northern (Steller) sea lion (Eumetopias jubatus) colony in Inian Pass near Cross Sound, southeastern Alaska
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.
A very rare sighting of an adult blue Whale (Balaenoptera musculus) fluke-up dive off the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway
Adult gray seal (Halichoerus grypus) along the Langanes peninsula, Iceland
Lindblad Expeditions guests with a lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica.
Adult Fin Whale (Balaenoptera physalus) surfacing in the Scotia Sea
Adult Antarctic Minke Whale (Balaenoptera bonaerensis) surfacing in ice near Larrouy Island on the western side of the Antarctic Peninsula
A lone adult dwarf minke whale (Balaenoptera acutorostrata subspecies) surfacing in the tropical south Atlantic Ocean
Green sea turtle (Chelonia mydas) at cleaning station at Olowalu Reef, Maui, Hawaii, USA
Adult Bryde's whale (Balaenoptera edeni) surface skim feeding on euphausids off Isla del Carmen, Gulf of California (Sea of Cortez), Baja California Sur, Mexico
Crabeater seals (Lobodon carcinophaga) swimming along or hauled out on fast ice floe in Bourgeois Fjord near the Antarctic Peninsula
Adult male walrus (Odobenus rosmarus rosmarus) hauled out on the beach at Poolepynten in Prins Karls Forland, Barents Sea, Norway
Adult emperor penguin (Aptenodytes forsteri) on sea ice near Snow Hill Island in the Weddell Sea, Antarctica.
Young Galapagos sea lion (Zalophus wollebaeki) catching and eventually eating a Sally Lightfoot crab (Grapsus grapsus) in the Galapagos Island Group, Ecuador. Pacific Ocean.
Kayaking with a leopard seal near Danco Island, Antarctica
Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Group, Ecuador. Pacific Ocean.
Adult male walrus (Odobenus rosmarus rosmarus) on ice floes near Moffen Island, Svalbard Archipelago in the Barents Sea, Norway
Weddell Seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, southern Ocean
Researcher Stephanie Martin takes a blubber biopsy using an arrow fired from a crossbow of an adult blue whale (Balaenoptera musculus), South Orkney islands, Antarctica, Southern Ocean
Adult female leopard seal (Hydrurga leptonyx) stalking, then killing and eating an adult gentoo penguin in Paradise Bay, Antarctica, Southern Ocean
Excited whale watchers on shore see all three resident killer whale (Orcinus orca) pods off Lime Kiln lighthouse, San Juan Island, Washington State, USA
California gray whale (Eschrichtius robustus) calf with excited whale watchers in San Ignacio Lagoon on the Pacific side of the Baja Peninsula, Baja California Sur, Mexico
Adult green sea turtle (Chelonia mydas agassizii) underwater off the west side of Isabela Island in the waters surrounding the Galapagos Island Archipeligo, Ecuador. Pacific Ocean.
Gentoo penguin (Pygoscelis papua) adult feeding chick in Antarctica
Adult humpback whale (Megaptera novaeangliae) breaching in the fjord of Isfjardardjup, Iceland
Hawaiian Spinner Dolphin (Stenella longirostris) spinning, possibly to dislodge attached remoras, Lanai, Hawaii, USA, Pacific Ocean
California sea lion (Zalophus californianus) underwater at Los Islotes (the islets) just outside of La Paz, Baja California Sur in the Gulf of California (Sea of Cortez), Mexico.
Divers Lisa Trotter and Robert Alexander enter the water with a large, curious, female leopard seal (Hydrurga leptonyx) near Booth Island on the western side of the Antarctic Peninsula, Antarctica
Adult Peale's Dolphin (Lagenorhynchus australis) bow-riding in the Falkland Islands, South Atlantic Ocean
Adult female leopard seal (Hydrurga leptonyx) with Lindblad Expedition guests at Brown Bluff near the Antarctic Peninsula, Southern Ocean
California gray whale (Eschrichtius robustus) calf with excited whale watchers in San Ignacio Lagoon, Baja California Sur, Mexico
Hawaiian Spinner Dolphin pod (Stenella longirostris) underwater in Honolua Bay off the northwest coast of Maui, Hawaii, USA, Pacific Ocean
Double Sprial Worm Bispira volutacornis
Coral Ctenocella sp
Featherstar Comanthina sp
Saddled Toby Canthigaster coronathus
Diver and Banded Sea Snake Laticauda colubrina
Sea Squirt Clavelina robusta
Adult emperor penguin (Aptenodytes forsteri) on sea ice near Snow Hill Island in the Weddell Sea, Antarctica.
Mushroom Coral Fungia sp
Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Group, Ecuador. Pacific Ocean.
National Geographic photographer Joel Sartore and his wife Kathy kayaking with a leopard seal near Danco Island, Antarctica
Curious northern (Steller) sea lion (Eumetopias jubatus) colony in Inian Pass near Cross Sound, southeastern Alaska
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
Sperm Whale (Physeter macrocephalus) surfacing in the mid-riff Island area of the Gulf of California (Sea of Cortez), Sonora, Mexico
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador
A lone adult dwarf minke whale (Balaenoptera acutorostrata subspecies) surfacing in the tropical south Atlantic Ocean
The Leopard seal (Hydrurga leptonyx) is the second largest species of seal in the Antarctic
Lindblad guests with an adult California Gray Whale (Eschrichtius robustus) in Magdalena Bay, Baja California Sur, Mexico
South American Sea Lion (Otaria flavescens) hauled out on small rocky islet just outside Ushuaia, Beagle Channel, Argentina
Adult emperor penguin (Aptenodytes forsteri) on sea ice near Snow Hill Island in the Weddell Sea, Antarctica.
Adult male walrus (Odobenus rosmarus rosmarus), Prins Karls Forland, Svalbard Archipelago, Barents Sea, Norway
Gentoo penguin parent (Pygoscelis papua) with chicks in Antarctica, Southern Ocean
Pregnant female southern elephant seal (Mirounga leonina) giving birth on the beach near the abandoned whaling station at Stromness Bay on South Georgia Island in the Southern Ocean
Hawaiian Spinner Dolphin pod (Stenella longirostris) underwater in Honolua Bay off the northwest coast of Maui, Hawaii, USA, Pacific Ocean
Young Galapagos sea lion (Zalophus wollebaeki) catching and eventually eating a Sally Lightfoot crab (Grapsus grapsus) in the Galapagos Island Group, Ecuador. Pacific Ocean.
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater near snorkeler in the Galapagos Island Group, Ecuador
Adult Galapagos penguin (Spheniscus mendiculus) hunting fish underwater in the Galapagos Island Group, Ecuador