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Close-up view of a Hawksbill sea turtle next to a red sea fan on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Scavenging sea stars and a humpback shrimp (Pandalus hypsinotus) working on the remains of a rock crab, Canada, North America

Colorful soft corals (Dendronephthya sp.) adorn the stunning reefs of southern Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

A harlequin swimming crab (Lissocarcinus laevis), lives with this sea anemone in symbiosis, Philippines, Southeast Asia, Asia

Sea star shimp (Periclimenes soror), on a crown-of-thorns starfish (Acanthaster planci), Yap, Micronesia, Pacific

Green sea turtle getting its shell cleaned by goldring surgeonfish off Maui, Hawaii, United States of America, Pacific, North America

A garibaldi (Hypsypops rubicundus) in a forest of giant kelp off Catalina Island, California, United States of America, North America

Several green sea turtles (Chelonia mydas) gather at a cleaning station off West Maui, Hawaii, United States of America, Pacific, North America

The porcelain crab (Neopetrolisthes maculatus), commensal in sea anemones, Philippines, Southeast Asia, Asia

Turbines at Parque Eolico de Lanzarote wind farm, Lanzarote, Canary Islands, Spain, Atlantic, Europe

A sea star shimp (Periclimenes soror), swims through a forest of spines on the back of a crown-of-thorns starfish, Micronesia, Pacific

Raccoon butterflyfish (Chaetodon lunula) and saddle wrasse (Thalassoma duperrey), off the island of Lanai, Hawaii, United States of America, Pacific, North America

Alcyonaria coral with schooling anthias dominate this Fijian reef scene, Fiji, South Pacific, Pacific

A gathering of robe hem hypselodoris nudibranchs (Hypselodoris apolegma), Komodo, Indonesia, Southeast Asia, Asia

Adult killer whale (Orcinus orca) surfacing with kelp on its flukes in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

A slightly bleached staghorn coral colony grows in shallow water in the Solomon Islands. This Melanesian region is known for its spectacular marine biodiversity.

A school of big-eye jacks (Caranx sexfasciatus) above a coral reef in the Solomon Islands. This region is known for its healthy fish populations.

A hawksbill sea turtle swims over a coral reef in Palau. This is an endangered species often hunted for its shell and meat.

Beautiful soft coral colonies grow on a healthy coral reef in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A beautiful set of tiny tunicates grows on a reef in Indonesia.This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

Corals grow on a shallow reef in Indonesia. This beautiful, tropical region is known for its spectacular reefs and high marine biodiversity.

A snowflake moray eel (Echidna nebulosa) pokes its head out of a hole in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A colorful crinoid clings to a coral reef slope in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

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.

Fast-growing corals (Acropora sp.) are being grown by scientists in the Caribbean Sea. Once they reach a certain size they will be planted on a reef that has been previously damaged.

A colorful set of gorgonians, reef-building corals, and other invertebrates grow on a diverse reef in the Caribbean Sea.

A large roughtail stingray (Dasyatis centroura) rests on the seafloor near Turneffe Atoll, Belize. This species is found throughout much of the Atlantic near reefs.

A yellow stingray (Urobatis jamaicensis) lays on the sandy seafloor of Turneffe Atoll in Belize. This small and beautiful elasmobranch ranges throughout the Caribbean Sea.

A yellow stingray (Urobatis jamaicensis) lays on the sandy seafloor of Turneffe Atoll in Belize. This small and beautiful elasmobranch ranges throughout the Caribbean Sea.

A Caribbean reef octopus (Octopus briareus) explores the seafloor of a shallow reef off the coast of Belize. This intelligent cephalpod ranges throughout the Caribbean feeding on lobster, crab, and small fish.

A broadclub cuttlefish (Sepia latimanus) hovers above a beautiful coral reef in Komodo National Park, Indonesia.

Colorful reef fish, mainly Scalefin anthias (Pseudanthias squamipinnis), swim above a beautiful set of corals growing near Alor in the Lesser Sunda Islands of Indonesia.

A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of the Blue Hole in Lighthouse Reef in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.

A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of the Blue Hole in Lighthouse Reef in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.

Fast-growing staghorn coral fragments, Acropora sp., are being grown in hopes of replanting colonies in reef areas of the Caribbean Sea that have been damaged.

A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of Turneffe Atoll in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.

Colorful chocolate chip sea stars, Protoreaster nodosus, cover the seafloor in a seagrass meadow in Wakatobi National Park, Indonesia.

A well-camouflaged reef stonefish, Synanceia verrucosa, waits to ambush prey in Raja Ampat, Indonesia.

A well-camouflaged reef stonefish, Synanceia verrucosa, waits to ambush prey in Raja Ampat, Indonesia.

Mother and calf humpback whales, Megaptera novaeangliae, swim in the clear, blue waters of the Caribbean Sea.

Vibrant sea cucumbers, tunicates, hydroids, and other invertebrates cling to a reef in Raja Ampat, Indonesia.

Discarded plastic bags and other trash float above a shallow coral reef in Raja Ampat, Indonesia. Plastics have become a major pollution problem worldwide.

Healthy corals thrive along the edge of a mangrove forest in a remote part of Raja Ampat, Indonesia.

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.

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.

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.

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.

A Wonderpus, Wunderpus photogenicus, hunts for prey on the sandy seafloor in Lembeh Strait, Indonesia.

A bleached magnificent sea anemone is found on a reef off the coast of Sulawesi in Indonesia. Bleaching is usually associated with higher than normal sea temperatures.

A brightly colored soft coral adorns prop roots in a blue water mangrove forest in Raja Ampat, Indonesia.

A huge giant clam, Tridacna gigas, grows on a shallow coral reef amid the tropical islands of Raja Ampat, Indonesia.

A colorful soft coral adorns a giant clam, Tridacna sp., growing on a healthy reef in Raja Ampat, Indonesia.

A broadclub cuttlefish, Sepia latimanus, hovers over a healthy reef on the remote island of Teun in Indonesia's Banda Sea.

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.

Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America

Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America

Southern giant petrel (Macronectes giganteus), feeding on a sheep carcass at West Point Island, Falkland Islands, South America

Views of the abandoned whaling station in Stromness Bay on South Georgia in the Southern Ocean, Polar Regions

Long line fishing boat in Cross Sound with the Fairweather Mountain Range as backdrop, Southeast Alaska, United States of America, North America

Waves crashing against the shore in Cross Sound, Southeast Alaska, 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 close up view of a beetle on hogweed (Heracleum spp) found in the Solovetsky Islands, Arkhangelsk Oblast, White Sea, Russia, Arctic, Europe

Adult great skua (Stercorarius skua) with recent kill in the Svalbard Archipelago, Norway, Arctic, Europe

Northern fulmar (Fulmarus glacialis glacialis) on the wing over calm seas in the Svalbard Archipelago, Norway, Arctic, Europe

Great frigatebird (Fregata minor) feeding on erupting green sea turtle (Chelonia mydas) hatchlings in the Galapagos, UNESCO World Heritage Site, Ecuador, South America

Great frigatebird (Fregata minor) feeding on erupting green sea turtle (Chelonia mydas) hatchlings in the Galapagos, UNESCO World Heritage Site, Ecuador, South America

Great frigatebird (Fregata minor) taking handouts from a fisherman in Puerto Ayora on Santa Cruz Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult great blue heron (Ardea herodias cognata) feeding on green sea turtle hatchlings, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult great blue heron (Ardea herodias cognata) feeding on green sea turtle hatchlings, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult great blue heron (Ardea herodias cognata) hunting for green sea turtle hatchlings in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult great blue heron (Ardea herodias cognata) hunting for green sea turtle hatchlings in the Galapagos Islands, 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