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A warty frogfish (Antennarius maculatus) is well-camouflaged as it waits to ambush prey on a reef in Komodo National Park, Indonesia.
Detail of an encrusting sponge growing on a coral reef in Komodo National Park, Indonesia.
A pink anemonefish, Amphiprion perideraion, swims above its beautiful host anemone in Wakatobi National Park, Indonesia.
A magnificent humpback whale, Megaptera novaeangliae, swims in the clear, blue waters of the Caribbean Sea.
Small cardinalfish hover amid mangrove prop roots in a remote part of Raja Ampat, Indonesia.
A school of lined sweetlips, Plectorhinchus lineatus, swim above a healthy coral reef in Raja Ampat, Indonesia.
Garden coral, sponges, and other invertebrates grow in a shallow seagrass meadow in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.
Sunlight shines on beautiful corals thriving among the scenic islands of Raja Ampat, Indonesia.
A beautiful coral reef thrives around an island in a remote part of Raja Ampat, Indonesia.
A huge giant clam, Tridacna gigas, grows on a shallow coral reef amid the tropical islands of Raja Ampat, Indonesia.
Beautiful mushroom coral and reef fish thrive amid the tropical islands of Raja Ampat, Indonesia.
A massive giant clam, Tridacna gigas, grows on a shallow coral reef in Raja Ampat, Indonesia.
A beautiful nudibranch, Doriprismatica atromarginata, feeds on a reef in Indonesia's Banda Sea.
Detail of a scorpionfish's face in Indonesia's Banda Sea.
A giant oceanic manta ray hovers over a cleaning station near a sea fan, Raja Ampat, Indonesia.
A black-banded sea krait, Laticauda semifasciata, swims over beautiful corals off the remote island of Manuk in the Banda Sea, Indonesia. This volcanic island is known as the island of the snakes.
A spotted porcelain crab, Neopetrolisthes maculatus, snuggles into its host anemone in Komodo National Park, Indonesia.
A banded pipefish hovers above the substrait where it lives, Anilao, Philippines.
A young sea lion plays under the an oil rig platform, Southern California.
A scorpionfish sits on a reef with a big frown, Red Sea, Egypt.
A manta ray passes overhead under the sun, Socorro Island, Mexico.
Schooling fish in vibrant yellow hover over a coral reef in Raja Ampat, Indonesia.
A large crocodile lurks on the bottom of the sea, Caribbean Sea, Mexico.
A crocodile stalking its prey, Caribbean Sea, Mexico.
A crocodile approaches slowly over the sand, Caribbean Sea, Mexico.
Crocodile under water, Caribbean Sea, Mexico.
An oceanic whitetip shark approaches from the blue waters around Elphinstone, Red Sea.
A hawksbill turtle rests on a coral reef, Raja Ampat, Indonesia.
A sea spider hunts in coral polyps for its dinner, Anilao, Philippines.
L'Austral cruise ship at the Gentoo penguin colony (Pygoscelis papua) in Damoy Point, Wiencke Island, Antarctica, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) attempting to cool off by flinging sand on his back, South Georgia, Polar Regions
Flying fish from the family Exocoetidae taking flight near White Island, North Island, New Zealand, Pacific
Flying fish from the family Exocoetidae taking flight near White Island, North Island, New Zealand, Pacific
Dusky dolphin (Lagenorhynchus obscurus) surfacing off Kaikoura, South Island, New Zealand, Pacific
Sea Iguana sleeping on shrubs, Isabela Island, Galapagos, Ecuador, South America
Curious walrus (Odobenus rosmarus rosmarus) near Apollo Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia
Sea anemone, Bohol Sea, Philippines.
Eye close-up on a crocodile flathead, New Ireland, Papua New Guinea.
Spotted porcelain crab, New Ireland, Papua New Guinea.
Squirrelfish in St. Croix, U.S. Virgin Islands.
Scorpionfish, Indonesia.
Underwater clownfish in anemone at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
An Atlantic Puffin (Fratercula arctica), on a cliff edge in Borgarfjaroarhofn, Iceland, Polar Regions
Adult gentoo penguins (Pygoscelis papua), returning and coming from the sea at Booth Island, Antarctica, Southern Ocean, Polar Regions
Guests from the Lindblad Expeditions ship National Geographic Sea Bird during Zodiac operations near a feeding sea otter in Southeast Alaska, United States of America, North America
View across the Gulf of Mexico, sunset, brown pelican prominent, Mallory Square, Old Town, Key West, Florida Keys, Florida, United States of America, 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
Aerial view of tourist admiring the colorful starfish snorkeling in the turquoise lagoon, Zanzibar, Tanzania, East Africa, Africa
Adult polar bear (Ursus maritimus) in day bed on first year sea ice in Olga Strait, near Edgeoya, Svalbard, Arctic, Norway, Scandinavia, Europe
Adult striped dolphin (Stenella coeruleoalba) leaping near La Gomera, Canary Islands, Spain, Atlantic, Europe
Adult polar bear (Ursus maritimus) leaping across open lead in first year sea ice in Olga Strait, near Edgeoya, Svalbard, Arctic, Norway, Scandinavia, Europe
Adult polar bear (Ursus maritimus) stretching on first year sea ice in Olga Strait, near Edgeoya, Svalbard, Arctic, Norway, Scandinavia, Europe
Adult striped dolphin (Stenella coeruleoalba) leaping near La Gomera, Canary Islands, Spain, Atlantic, Europe
Svalbard reindeer (Rangifer tarandus) on the tundra in Varsolbukta, Bellsund, Spitsbergen, Arctic, Norway, Scandinavia, Europe
Adult polar bear (Ursus maritimus) on first year sea ice in Olga Strait, near Edgeoya, Svalbard, Arctic, Norway, Scandinavia, Europe
Adult striped dolphin (Stenella coeruleoalba) leaping near La Gomera, Canary Islands, Spain, Atlantic, Europe
Adult striped dolphin (Stenella coeruleoalba) leaping near La Gomera, Canary Islands, Spain, Atlantic, Europe
Gentoo penguins on iceberg, Antarctica, Polar Regions
Adult California gray whales (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America
An adult brown skua (Catharacta antarctica) feeding on a dead elephant seal pup at St. Andrews Bay, South Georgia
Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia
Pregnant female southern elephant seal (Mirounga leonina) giving birth on the beach in Stromness Bay, South Georgia Island
Female southern elephant seal (Mirounga leonina) with newborn pup on the beach in Stromness Bay, South Georgia Island
Female southern elephant seal (Mirounga leonina) with newborn pup as skuas (Catharacta antarctica) fight for the afterbirth, South Georgia
Purple stove-pipe sponge (Aplysina archeri), with boat in background, Curacao.
A green sea turtle (Chelonia mydas) in the sea grass, Saint Croix, U.S. Virgin Islands.
The shell of a green sea turtle (Chelonia mydas) swimming to the surface, Saint Croix, U.S. Virgin Islands.
The face of a green sea turtle (Chelonia mydas), Saint Croix, U.S. Virgin Islands.
Christmas tree worms (Spirobranchus giganteus) on brain coral, Saint Croix, U.S. Virgin Islands.
Lined seahorse (Hippocampus erectus).
Green sea turtle with remora on back, Tiger Beach, Bahamas.
Great hammerhead shark turning, Tiger Beach, Bahamas.
Grean sea turtle with reflection in surface, Tiger Beach, Bahamas.
Green sea turtle swimming on the ocean floor, Tiger Beach, Bahamas.
Great hammerhead shark and tiger shark, Tiger Beach, Bahamas.
Great hammerhead shark, Tiger Beach, Bahamas.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
A starfish with spiny sea urchins at Quadra Island, British Columbia in Canada.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
An oceanic whitetip shark (C. longimanus) and surface reflections at Cat Island in the Bahamas.
A boat captain watches an oceanic whitetip shark below at Cat Island in the Bahamas.
A giant oceanic manta ray (Mobula birostris) with attached remoras at San Benedicto island in Mexico.
A hawksbill sea turtle (Eretmochelys imbricata) feeds on sponge and an angelfish follows for scraps in Cozumel, Mexico.
A ribbon eel (Rhinomuraena quaesita) in Indonesia.
A reef manta ray (Mobula alfredi) feeding at night in Hawaii.
A scalloped hammerhead shark (Sphyrna lewini) at Socorros Island in Mexico.
Two squat anemone shrimp (Thor amboinensis) in Curacao.
A diver has a close encounter with an oceanic whitetip shark (Carcharhinus longimanus) at Cat Island in the Bahamas.
Golden cuttlefish, Lembeh Strait, Indonesia.
Arrow Crab close-up, West Palm Beach, Florida.
A pair of Christmas tree worms in Cozumel, Mexico.
A colorful reef scene with sunburst at Cozumel, Mexico.
A pair of pink nudibranchs, Lembeh Strait, Indonesia.
A loggerhead sea turtle off the coast of North Carolina.
A hawksbill sea turtle resting under a reef in Cozumel, Mexico.
Diving with oceanic whitetip sharks, Cat Island, Bahamas.
Diver swimming with oceanic whitetip sharks, Cat Island, Bahamas.
Oceanic whitetip shark with reflection, Cat Island, Bahamas.