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Adult humpback whale (Megaptera novaeangliae), surfacing near researchers in Zodiac at sunset, Iceland

Group of at least eight killer whales (Orcinus orca) surfacing off the coast of the island of Surtsey, southern Iceland

Group of at least eight killer whales (Orcinus orca) surfacing off the coast of the island of Surtsey, southern Iceland

Woman holding two red starfish snorkeling in the turquoise sea in summer, Zanzibar, Tanzania, East Africa, Africa

Man and woman with scuba masks showing starfish swimming underwater in the exotic lagoon, Zanzibar, Tanzania, East Africa, Africa

Mother and son with scuba masks showing red starfish underwater, Zanzibar, Tanzania, East Africa, Africa

Adult black-browed albatrosses (Thalassarche melanophris), in flight at breeding colony on West Point Island, Falklands, South America

Black-browed albatross (Thalassarche melanophris), chick at breeding colony on Saunders Island, Falklands, South America

View of Giant Lilies Pond in Sir Seewoosagur Ramgoolam Botanical Garden, Mauritius, Indian Ocean, Africa

Indian Cormorant (Indian shag) (Phalacrocorax fuscicollis) above water on trunk tree with opened wings, Poovar, Thiruvanthapurm, Kerala, India, Asia

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.

Blacktip reef sharks swim just under the surface in the Solomon Islands. This beautiful Melanesian region is known for its spectacular reefs and high marine biodiversity.

Detail of anchor coral tentacles (Euphyllia sp.) growing on a reef in Indonesia. This area is known for its high marine biodiversity.

False clownfish (Amphiprion ocellaris) swim near their host anemone in Alor, Indonesia. This remote region is known for its beautiful reefs and spectacular marine biodiversity.

Colorful gorgonians and reef-building corals grow in shallow water near the famous Blue Hole in Belize. This part of Central America is well known for its clear waters and beautiful coral reefs.

A Clark's anemonefish (Amphiprion clarkii) snuggles amongst its host's tentacles on a reef in Lembeh Strait, Indonesia.

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.

Delicate corals grow on a shallow reef near the island of Flores in Indonesia. This beautiful region is known for its spectacular reefs and high marine biodiversity.

Sunlight sparkles through a table coral (Acropora sp.) in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A lionfish (Pterois volitans) displays its venomous spines in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

A lionfish (Pterois volitans) swims along the edge of a beautiful reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

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

A translucent shrimp (Vir philippinensis) crawls on bubble coral in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

Acoel flatworms cover a coral colony on a reef in Raja Ampat, Indonesia. This remote, tropical region is home to extraordinary marine biodiversity.

A tiny shrimp (Periclimenes soror) lives on a pin-cushion starfish in Raja Ampat, Indonesia. This remote, tropical region is home to 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 beautiful nudibranch (Phyllidia ocellata) crawls over the seafloor of Raja Ampat in eastern Indonesia.

A juvenile many-spotted sweetlips (Plectorhinchus chaetodonoides) feeds on a small fish near the seafloor in Lembeh Strait, Indonesia.

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

A crown of thorns starfish (Acanthaster planci) feeds on a coral reef growing near an island in the Banda Sea, Indonesia.

A well-camouflaged tasseled wobbegong shark (Eucrossorhinus dasypogon) lies on the sandy seafloor of Raja Ampat, Indonesia.

Detail of the colorful tentacles on a bulbed anemone, Entacmaea quadricolor, growing on a reef near Alor in Indonesia.

A beautiful coral reef thrives in the shallows of Alor, Indonesia. This remote region is home to a wide array of marine biodiversity.

Specialized mangrove roots, called pneumatophores, rise from the shallow seafloor in Alor, Indonesia.

A pink anemonefish, Amphiprion perideraion, swims above its beautiful host anemone in Wakatobi National Park, Indonesia.

A well-camouflaged yellow stingray, Urobatis jamaicensis, swims over a shallow seagrass meadow growing within Turneffe Atoll's lagoon in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth

A vibrant nudibranch, Chromodoris sp., crawls across a coral reef in the remote, tropical islands of Raja Ampat, Indonesia.

A vibrant nudibranch, Phyllidia sp., feeds on sponges on a coral reef in the remote, tropical islands of Raja Ampat, Indonesia.

A blue starfish on a beautiful coral reef in the shallows of 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 magnificent humpback whale, Megaptera novaeangliae, swims in the clear, blue waters of the Caribbean Sea.

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

A school of lined sweetlips, Plectorhinchus lineatus, swim above a healthy coral reef in Raja Ampat, Indonesia.

Sunlight filters into the shadows of a thick mangrove forest 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 magnificent sea anemone, Heteractis magnifica, grows on a reef 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.

A Florida manatee, Trichechus manatus latirostris, rises to the surface of Crystal River, Florida. This endangered sirenian subspecies migrates to inland rivers during the winter where water temperatures are warmer than the ocean.

A thick school of yellow-striped scad swims below a jetty amid the tropical islands of Raja Ampat, Indonesia.

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 starry night octopus, Callistoctopus luteus, searches for prey on a reef flat at night in Raja Ampat, Indonesia.