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Adult olive-headed sea snake (Hydrophis major), swimming on Ningaloo Reef, Western Australia, Australia, Pacific

Humpback whale (Megaptera novaeangliae), mother and calf underwater, Ningaloo Reef, Western Australia, Australia, Pacific

Shakespeare Cliff Lookout, view over Cooks Beach, Coromandel Peninsula, North Island, New Zealand, Pacific

Waterfall off towering cliffs on Doubtful Sound, Fiordland National Park, Te Wahipounamu, UNESCO World Heritage Site, South Island, New Zealand, Pacific

Panama Canal Railway linking the Atlantic Ocean at Colon, to the Pacific Ocean, Panama City, Republic of Panama, Central America

Bangka (boat) over coral, Chindonan Island, Calamian Islands, Coron, Palawan, Philippines, Southeast Asia, Asia

Bartolome Island with Pinnacle Rock, a volcanic plug, to the right, the location featured in the 2003 film Master and Commander, Galapagos islands, UNESCO World Heritage Site, Ecuador, South America

Le Bora Bora by Pearl Resort, Moto Tevairoa island, Bora Bora, French Polynesia, South Pacific, Pacific

A tiny cleaner shrimp removes parasites from a Black-finned snake eel (Ophichthus cephalozona) on a sandy seafloor in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

A beautiful nudibranch (Hypselodoris bullockii) crawls slowly across a reef in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

A pair of spotted eagle rays (Aetobatus narinari) swim over the deep, sandy seafloor near Cocos Island, Costa Rica. This remote, Pacific island is famous for its healthy fish and shark populations.

A bulbed anemone (Entacmaea quadricolor) grows on a reef in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A beautiful starfish (Linckia laevigata) lays on a thriving reef in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

A shortfin lionfish (Dendrochirus brachypterus) lays on the seafloor waiting for prey to swim near in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

Abstract of a mushroom coral (Fungia sp.) growing on a reef in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

Soft corals, sponges, and other invertebrates compete for space on a beautiful reef in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

A colorful nudibranch (Nembrotha kubaryana) crawls slowly across a reef near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

A camouflaged horned flathead (Thysanophrys carbunculus) lays hidden on a sandy slope near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

Crinoids cling to a large sponge on a healthy coral reef near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

An unusual sea star (Linckia laevigata) clings to a diverse reef near the island of Bangka, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

A massive school of bigeye trevally (Caranx sexfasciatus) swims in deep water near Cocos Island, Costa Rica. This remote island is home to an incredible variety of marine life.

A school of juvenile striped eel catfish (Plotosus lineatus) swims over the seafloor in Komodo National Park, Indonesia.

Detail of a colorful giant clam (Tridacna maxima) growing on a reef near Alor in the Lesser Sunda Islands of Indonesia.

Colorful chocolate chip starfish (Protoreaster nodosus) cling to the seafloor of a seagrass meadow in Komodo National Park, Indonesia.

Colorful reef fish, mainly Scalefin anthias (Pseudanthias squamipinnis), swim above a healthy reef in the Lesser Sunda Islands of Indonesia.

A predatory stonefish (Synanceia verrucosa) lies camouflaged in the sandy seafloor of Komodo National Park, Indonesia. This is the most venomous fish on Earth but uses its venom only for defensive purposes.

A predatory stonefish (Synanceia verrucosa) lies camouflaged in the sandy seafloor of Komodo National Park, Indonesia. This is the most venomous fish on Earth but uses its venom only for defensive purposes.

A young false clownfish (Amphiprion ocellaris) snuggles into its host anemone in Komodo National Park, Indonesia.

Colorful chocolate chip sea stars (Protoreaster nodosus) lay on the shallow sandy seafloor of Raja Ampat in eastern Indonesia.

A beautiful nudibranch (Glossodoris cincta) crawls on the black sand seafloor in Lembeh Strait, Indonesia.

A beautiful nudibranch (Glossodoris rufomarginata) crawls across the black sand seafloor in Lembeh Strait, Indonesia.

A traditional fish trap, made out of bamboo, captures small reef fish near Alor in the Lesser Sunda Islands of Indonesia.

A blue line grouper (Cephalopholis formosa) swims on a reef in the Lesser Sunda Islands of Indonesia.

A young painted frogfish (Antennarius pictus) sits on the volcanic seafloor of Lembeh Strait, Indonesia.

A lionfish (Pterois volitans) hunts for prey in a seagrass meadow in the Banda Islands of eastern Indonesia.

A beautiful coral reef grows near an island in the Banda Sea, Indonesia. This remote and historic region, known previously for the Spice Islands, harbors extraordinary marine biodiversity.

A banded sea krait, Laticauda colubrina, searches for prey on a coral reef in Raja Ampat, Indonesia. This tropical area is known for its extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

Bright beams of sunlight descend into the shadows of a blue water mangrove forest in 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.

A beautiful coral reef thrives 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.

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.

A colorful nudibranch, Hypselodoris tryoni, crawls across a sandy sea floor 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.

Aerial view of the idyllic island of Gili Banta just outside of Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for its marine biodiversity as well as its infamous Komodo dragons.

A colorful warty frogfish, Antennarius maculatus, yawns as it waits for prey to swim close by in Komodo National Park, Indonesia.

A colorful ornate ghost pipefish, Solenostomus paradoxus, hovers over a coral reef in Komodo National Park, Indonesia.

A small, well-camouflaged cuttlefish, Sepia sp., hovers on a rocky seafloor in the Banda Sea, Indonesia.

A colorful warty frogfish, Antennarius maculatus, yawns as it waits for prey to swim close by in Komodo National Park, Indonesia.

Detail of a reef-building coral colony, Favia sp., growing on a healthy reef in Komodo National Park, Indonesia.

A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea. This part of eastern Indonesia is home to part of the world's greatest marine biodiversity.

Detail of a reef-building coral colony growing on a healthy reef in Komodo National Park, Indonesia.

A greater blue-ring octopus, Hapalochlaena lunulata, crawls across a coral reef in Komodo National Park, Indonesia. There are several blue-ring octopus species and all of them are extremely venomous.

Glacial iceberg detail from ice calved off the South Sawyer Glacier in Tracy Arm, Southeast Alaska, Pacific Ocean, United States of America, North America

Fishing net and fishermen on boat in town of Petersburg on Mitkof Island, Southeast Alaska, Pacific Ocean, United States of America, North America

Adult female sea otter (Enhydra lutris kenyoni) eating urchins she has gathered off the sea floor in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

Adult female sea otter (Enhydra lutris kenyoni) eating urchins she has gathered off the sea floor in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

Adult sea otter (Enhydra lutris kenyoni) mother with her pup on her chest in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

A view of the commercial whale watching vessel operating in Johnstone Strait, British Columbia, Pacific Ocean, Canada, North America

A pod of killer whales (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

This sunflower star is the largest of species in the Pacific Northwest and is a voracious carnivore.

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

Nazca booby (Sula grantii) downy chick in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Woman hiker looks out from Rubha Hunish Coast Guard lookout bothy to the Shiant Isles and Harris at this northernmost tip of Skye, an SSSI due to its geology and maritime cliffs, Rubha Hunish, Duntulm, Skye, Inner Hebrides, Scotland, United Kingdom, Europe

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, 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