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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.
A Nembrotha cristata nudibranch crawls over a tunicate.
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 very small (2-3mm) nudibranch in its natural habitat, Tulamben, Bali, Indonesia.
A tiny white hairy frogfish, Anilao, Philippines.
A young sea lion plays under the an oil rig platform, Southern California.
Turtle gazes at its reflection under the USS Kittiwake shipwreck in Grand Cayman, Cayman Islands.
A scorpionfish sits on a reef with a big frown, Red Sea, Egypt.
A juvenile broadclub cuttlefish about the size of a human thumb, Anilao, Philippines.
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.
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 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 trio of rays swim down a sandy gulch in the Indian Ocean, Maldives.
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.
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America
Adult female killer whale (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America
Humpback whale (Megaptera novaeangliae), surfacing off Half Moon Island in the South Shetland Island Group, Antarctica, Polar Regions
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.
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.
Whale Shark, La Paz, Mexico.
Crinoid in Raja Ampat, Indonesia.
Black and white banded Sea Krait, Indonesia.
Arrow crab on a sea fan, Belize.
Male great white shark, Guadalupe Island, Mexico.
Underwater profusion of hard plate corals at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia
Snorkeler in underwater profusion of hard plate corals at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Schooling yellow-tailed surgeonfish (Prionurus punctatus), underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
The endemic Galapagos marine iguana (Amblyrhynchus cristatus) feeding underwater in the Galapagos, UNESCO World Heritage Site, Ecuador, South America
Spotted eagle rays (Aetobatus narinari) underwater at Leon Dormido Island off San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Spotted eagle rays (Aetobatus narinari) underwater at Leon Dormido Island off San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Spotted eagle ray (Aetobatus narinari) underwater at Leon Dormido Island off San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Young Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Snorkeler with Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Archipelago, 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
Young Galapagos sea lion (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
Wreck of a C-53 Skytrooper, which went down on February 26, 1942 in Vansittart Bay, Kimberley, Western Australia, Australia, Pacific
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
Adult Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Southern Ocean, Polar Regions
Humpback whale (Megaptera novaeangliae) flukes-up dive in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions
Gentoo penguin (Pygoscelis papua) adult with chicks at breeding colony on Booth Island, Antarctica, Southern Ocean, Polar Regions
Galapagos sea lions (Zalophus wollebaeki) hauled out on the beach in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
A small pod of Type B killer whales (Orcinus nanus) just outside Duse Bay in the Weddell Sea, Antarctica, Polar Regions
Antarctic fur seal pups (Arctocephalus gazella) mock-fighting on South Georgia, Southern Ocean, Polar Regions
Patterns in the kelp at low tide on South Georgia Island, Southern Ocean
Freakled hawkfish (Paracirrhites forsteri) sits on some Acropora coral on a Fijian reef.
A pair of humpback whales (Megaptera novaeangliae), underwater on the Silver Bank, Dominican Republic, Greater Antilles, Caribbean, Central America
Coral Reefs Monument at the waterfront of San Miguel de Cozumel, Cozumel Island, Quintana Roo State, Mexico
Killer whale female (Orcinus orca), tail-lobbing off Isla San Lorenzo, Baja California, Sea of Cortez, Mexico, North America
A myriad of hard and soft corals compete for space on the substrate of Darwin's Wall, Palau, Micronesia, Pacific
Killer whales (Orcinus orca), off Isla Carmen, Baja California Sur, Mexico, North America
Blue ocean underwater background, Thailand
A pod of Pacific white-sided dolphins (Lagenorhynchus obliquidens) leaping and surfacing in Johnstone Strait, British Columbia, Canada, North America
A pod of Pacific white-sided dolphins (Lagenorhynchus obliquidens) leaping and surfacing in Johnstone Strait, British Columbia, Canada, North America
An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Nurse shark (Ginglymostoma cirratum), with boat in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize
Nurse sharks (Ginglymostoma cirratum), massing 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
Southern stingray (Hypanus americanus) with snorkeler in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Southern stingray (Hypanus americanus), with snorkeler in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Southern stingray (Hypanus americanus), with snorkeler in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Green sea turtle (Chelonia mydas), feeding on the sand near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize