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A colorful and healthy coral reef thrives in shallow water in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.
A broadclub cuttlefish (Sepia latimanus) uses camouflage to blend into a shallow coral reef in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.
A baby broadclub cuttlefish (Sepia latimanus) hovers in Lembeh Strait, Indonesia.
A cluster of colorful tunicates grow on a coral reef amid the remote, tropical islands of Raja Ampat, Indonesia.
Small cardinalfish hover amid mangrove prop roots in a remote part of Raja Ampat, Indonesia.
An unidentified scorpionfish waits to ambush prey on a black sand slope 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 huge giant clam, Tridacna gigas, grows on a shallow coral reef amid the tropical islands of Raja Ampat, Indonesia.
A well-camouflaged tasselled wobbegong, Eucrossorhinus dasypogon, lies on the seafloor in Raja Ampat, Indonesia.
A huge whale shark, Rhincodon typus, swims in sunlit Indonesian waters. This massive yet harmless shark feeds on planktonic organisms and can sometimes be found swimming near fishing platforms due to the scent of fish.
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 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 pregnant pygmy seahorse clings to a frond of a gorgonian fan, Anilao, Philippines.
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 larval lionfish floats in the open ocean as plankton, Anilao, Philippines.
A tiny hard coral crab can be found burrowing in between the polyps of the coral, Anilao, Philippines.
A snail about the size of a coin generally lives under the sand but comes out at night to feed, Anilao, Philippines.
Blacktip reef sharks patrol the shallow waters around a small island in Tahiti, French Polynesia.
A honeycomb eel emerges from its den and appears to smile, Maldives.
Hippopotamus (Hippopotamus amphibius) in the river Khwai, Okavango Delta, Botswana, Africa
Curious walrus (Odobenus rosmarus rosmarus) near Apollo Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia
Adult gentoo penguins (Pygoscelis papua), returning and coming from the sea at Booth Island, Antarctica, Southern Ocean, Polar Regions
Aerial view of tourist admiring the colorful starfish snorkeling in the turquoise lagoon, Zanzibar, Tanzania, East Africa, Africa
Adult California gray whales (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America
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 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
Purple stove-pipe sponge (Aplysina archeri), with boat in background, Curacao.
A red, white and yellow Christmas tree worm (Spirobranchus giganteus), on coral, Curacao.
Goldentail moray eel (Gymnothorax miliaris), in coral reef, Curacao.
Chain moray eel (Echidna catenata), in coral reef, 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.
Headshot of a seaweed blenny (Parablennius marmoreus).
Christmas tree worms (Spirobranchus giganteus) on brain coral, Saint Croix, U.S. Virgin Islands.
Head of a goldentail moray eel (Gymnothorax miliaris).
Lined seahorse (Hippocampus erectus).
Tiger shark swimming over sand, Tiger Beach, Bahamas.
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.
Garibaldi fish on black background, Tiger Beach, Bahamas.
Great hammerhead shark and tiger shark, Tiger Beach, Bahamas.
Great hammerhead shark, Tiger Beach, Bahamas.
Front view of a tiger shark, Tiger Beach, Bahamas.
Reef shark, Tiger Beach, Bahamas.
Front view of a tiger shark, Tiger Beach, Bahamas.
Scuba divers interacting with a pair of tiger sharks, Tiger Beach, Bahamas.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
Two sheephead (Semicossyphus pulcher) In a kelp forest, Catalina Island, California.
A Caribbean reef squid on a deepwater night dive in West Palm Beach, Florida.
A starfish with spiny sea urchins at Quadra Island, British Columbia in Canada.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
A Caribbean reef squid on a deepwater night dive in West Palm Beach, Florida.
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 Caribbean reef shark (Carcharhinus perezi) in the Turks and Caicos.
A mahi mahi fish (Coryphaena hippurus) at Cat Island in the Bahamas.
A large orange frogfish at Cocos Island in Costa Rica.
A reef manta ray (Mobula alfredi) feeding at night in Hawaii.
A scalloped hammerhead shark (Sphyrna lewini) at Socorros Island in Mexico.
A diver shines a light in on a cavern filled with glassy sweepers (Pempheris schomburgkii) at Molasses Reef in Key Largo, Florida.
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.
Snowflake moray eel (Echidna nebulosa) in Costa Rica.
Snowflake moray eel (Echidna nebulosa) in Costa Rica.
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.
An Atlantic Spadefish swims amongst the sunken wreck of USS Indra off the coast of North Carolina.
Sunrays shining on a Garibaldi damselfish, Catalina Island, California.
A bioluminescent tunicate, Catalina Island, California.
Spotted cleaner shrimp on pink tipped anemone in Curacao.
American flag on a sunken ship in Key Largo, Florida.
A hawksbill sea turtle resting under a reef in Cozumel, Mexico.
Kelp forest with school of fish, Catalina Island, California.
Oceanic whitetip shark circling a boat off Cat Island, Bahamas.
Diving with oceanic whitetip sharks, Cat Island, Bahamas.
Oceanic whitetip shark with dorsal fin reflection, Cat Island, Bahamas.
Diver swimming with oceanic whitetip sharks, Cat Island, Bahamas.
Manta ray gliding through sunburst, San Benedicto Island, Mexico.
Oceanic whitetip shark with reflection, Cat Island, Bahamas.
A feeding hawksbill sea turtle in Cozumel, Mexico.
Diver swimming with an oceanic whitetip shark, Cat Island, Bahamas.
Close encounter with an oceanic whitetip shark, Cat Island, Bahamas.
Moray eel peeking its head through a reef in Curacao.