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A beautiful nudibranch, Chromodoris coi, crawls across the seafloor in Komodo National Park, Indonesia.
A sinuous soft coral grows in the shallows amid the tropical islands of 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 small, well-camouflaged cuttlefish, Sepia sp., hovers on a rocky seafloor in the Banda Sea, 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 healthy coral reef thrives in Komodo National Park, Indonesia.
Crinoids and soft corals cover this reef in Raja Ampat, Indonesia.
A giant oceanic manta ray hovers over a cleaning station near a sea fan, Raja Ampat, Indonesia.
A green sea turtle swims by a reef under the sun, North Sulawesi, Indonesia.
A healthy coral reef thrives in Komodo National Park, Indonesia.
A white crab holds its eggs under its carapace until they hatch, Tulamben, Bali, Indonesia.
A tiny white hairy frogfish, Anilao, Philippines.
A young sea lion plays under the an oil rig platform, Southern California.
A Caribbean reef shark and a school of fish, Grand Cayman, Cayman Islands.
A scorpionfish sits on a reef with a big frown, Red Sea, Egypt.
A hawksbill turtle glides through the water on a sunny day.
A titan triggerfish aggressively defends it's nest of eggs in the sand.
A school of unicorn fish hover over the Yolanda wreck, Red Sea, Egypt.
A large crocodile lurks on the bottom of the sea, Caribbean Sea, Mexico.
A crocodile stalking its prey, Caribbean Sea, Mexico.
A garden of water lilies in a Mexican Cenote, Caribbean Sea, Mexico.
Panamic cushion stars (Pentaceraster cumingi), gather on the sea floor, Sea of Cortez.
A pair of cuttlefish mating over a coral reef, Raja Ampat, Indonesia.
A longarm octopus flashes its colors at night, Anilao, Philippines.
A whip coral goby broods eggs it has laid on the whip coral where it lives, Anilao, Philippines.
A Doriprismatica nudibranch face on portrait, Anilao, Philippines.
A colorful tiger shrimp ventures from its home under rubble for only a few seconds, Anilao, Philippines.
A sea spider hunts in coral polyps for its dinner, Anilao, Philippines.
A thorny seahorse clings to an algae stock, Anilao, Philippines.
Blacktip reef sharks patrol the shallow waters around a small island in Tahiti, French Polynesia.
A school of sweetlip fish stacked up against a coral head, Maldives.
An oceanic whitetip shark soars through the water, Red Sea.
A coral bommie full of life, Maldives.
A coral bommie full of reef fish and healthy corals, Red Sea.
A large Napoleon wrasse swimming over a coral reef, Red Sea.
A titan triggerfish hovers in a cleaning station, Red Sea.
Snorkelling at Glass Beach, Ireland Island South, Somerset, Bermuda, Atlantic, North America
Sea urchins just caught and opened showing the edible cores (uni), Perna inlet, Palmizana, St Clement island, Hell's Islands (Pakleni), Hvar city, Hvar island, Croatia, Southeast Europe
Adult Dall's porpoise (Phocoenoides dalli) surfacing with characteristic rooster tail splash in Johnstone Strait, British Columbia, Canada, North America
Humpback whale (Megaptera novaeangliae) calf learning to slap the water surface.
Humpback whale (Megaptera novaeangliae) mother and her calf.
Humpback whale (Megaptera novaeangliae) mother and her calf.
A juvenile ornate ghost pipefish (Solenostomus paradoxus).
Hairy squat lobster (Lauriea siagiani), Anilao, Philippines.
Hawksbill sea turtle (Eretmochelys imbricata) swimming in the Red Sea.
Underwater mermaid statue at Grand Cayman island.
This sunflower star is the largest of species in the Pacific Northwest and is a voracious carnivore.
Rockmover wrasse in Raja Ampat, Indonesia.
Sea lion blowing bubbles, Los Islotes, La Paz, Mexico.
Crinoid in Raja Ampat, Indonesia.
Black and white banded Sea Krait, Indonesia.
Orangutan Crab on bubble coral, Indonesia.
Male great white shark, Guadalupe Island, Mexico.
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Young Galapagos sea lions (Zalophus wollebaeki) at play underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
A myriad of hard and soft corals, as well as tropical reef fish on the healthy reef near Volivoli Resort on Viti Levu, Fiji, South Pacific, Pacific
A myriad of hard and soft corals, as well as tropical reef fish on the healthy reef near Volivoli Resort on Viti Levu, Fiji, South Pacific, Pacific
A myriad of hard and soft corals, as well as tropical reef fish on the healthy reef near Volivoli Resort on Viti Levu, Fiji, South Pacific, Pacific
A myriad of hard and soft corals, as well as tropical reef fish on the healthy reef near Volivoli Resort 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
Diving and snorkling area, Punta Perdiz near Playa Giron, Bay of Pigs, Matanzas Province, Cuba, West Indies, Caribbean, Central America
Flying fish from the family Exocoetidae take flight as the ship flushes them just off Ascension Island in the southern tropical Atlantic Ocean, South Atlantic Ocean
Haenyeo women, famous for diving into their eighties and holding their breath for up to two minutes, free-diving for seafood and crustaceans, Jeju Island, South Korea, Asia
Haenyeo women, famous for diving into their eighties and holding their breath for up to two minutes, free-diving for seafood and crustaceans, Jeju Island, South Korea, Asia
A small pod of Type B killer whales (Orcinus nanus) just outside Duse Bay in the Weddell Sea, Antarctica, Polar Regions
Green sea turtle with remora on back, Tiger Beach, Bahamas.
Plate coral (Acropora hyacinthus) Beqa Lagoon, Fiji.
A large red gorgonian sea fan and black crinoid, Beqa Lagoon, Fiji.
Tomato clownfish in its host anenome, Fiji.
A large Lemon Shark gulps down a large tuna head in front of a crowd of divers, Fiji.
Scuba diver swimming underwater amongst sea sponges, Bonaire, Caribbean Netherlands.
Juvenile Damselfish use a large sponge for cover, Bonaire, Caribbean Netherlands.
Chromodoris Annulata nudibranch, Red Sea, Egypt.
Redback butterflyfish (Chaetodon paucifasciatus), Red Sea, Egypt.
Stargazer ugly face, Puerto Galera, Negros Oriental, Philippines.
Pink hairy squat lobster (Lauriea siagiani) inside a pink barrel sponge, Lembeh Strait, Bitung, North Sulawesi, Indonesia.
Giant Grouper, Great Barrier Reef, Queensland, Australia.
Sea Nettle Jellyfish in Atlantic Ocean.
Underwater photo taken during the Palancar Gardens, El Cielito and Colombia Deep Reef Snorkelling Tour, Cozumel Island, Quintana Roo State, Mexico
Stingray seen during Palancar Gardens, El Cielito and Colombia Deep Reef Snorkelling Tour, Cozumel Island, Quintana Roo State, Mexico
Whale shark, Madagascar, Indian Ocean, Africa
Killer whale female (Orcinus orca), tail-lobbing off Isla San Lorenzo, Baja California, Sea of Cortez, Mexico, North America
Snorkeler with moon jellyfish (Aurelia sp), in Jellyfish Lake, located on Eil Malk island, Rock Islands, Palau, Micronesia, Pacific
Crab, Tsarabanjina island, Mitsio archipelago, Republic of Madagascar, Indian Ocean
Killer whales (Orcinus orca), off Isla Carmen, Baja California Sur, Mexico, North America
Patterns in the kelp at low tide on New Island in the Falkland Islands
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
West Indian manatee (Trichechus manatus), on the sand near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
Soft corals and sponges underwater on Long Caye in the Mesoamerican Barrier Reef, Belize
Brassy chubs (Kyphosus vaigiensis), being fed by boat operators inside the Mesoamerican Barrier Reef, Belize
Adult fin whale (Balaenoptera physalus) sub-surface feeding in the rich waters off the Svalbard Archipelago, Norway
Adult fin whale (Balaenoptera physalus) sub-surface feeding in the rich waters off the Svalbard Archipelago, Norway
Gentoo penguins (Pygoscelis papua) feeding underwater at Booth Island, Antarctica, Polar Regions
Adult humpback whale (Megaptera novaeangliae), breaching in the fjord of Isfjardardjup, Iceland
Hard and soft corals on underwater reef on Jaco Island, Timor Sea, East Timor, Southeast Asia, Asia
Hard and soft corals and crinoid underwater on Sebayur Island, Komodo Island National Park, Indonesia, Southeast Asia, Asia
Adult dwarf minke whale (Balaenoptera acutorostrata), underwater near Ribbon 10 Reef, Great Barrier Reef, Queensland, Australia, Pacific
Whale shark (Rhincodon typus), underwater with snorkeler on Ningaloo Reef, Western Australia, Australia, Pacific
Humpback whale (Megaptera novaeangliae), mother and calf underwater, Ningaloo Reef, Western Australia, Australia, Pacific
An adult peacock mantis (Odontodactylus scyllarus), in the Equator Islands, Raja Ampat, Indonesia, Southeast Asia, Asia