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A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre
Colorful tunicates and soft corals grow on a reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.
A small red starfish clings to coralline algae in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.
Christmas tree worms (Spirobranchus giganteus) grow on a coral reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.
A pink anemonefish (Amphiprion perideraion) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.
A large mantis shrimp (Lysosquilla sp.) uses its excellent eyesight to scan its underwater environment in the Lesser Sunda Islands of Indonesia.
Detail of a colorful giant clam (Tridacna maxima) growing on a reef near Alor in the Lesser Sunda Islands of Indonesia.
A broadclub cuttlefish (Sepia latimanus) hovers above a beautiful coral reef in Komodo National Park, Indonesia.
A broadclub cuttlefish (Sepia latimanus) hovers above a beautiful coral reef in Komodo National Park, Indonesia.
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.
Detail of a coral colony in Raja Ampat, Indonesia. This remote, tropical region is home to extraordinary marine biodiversity.
A Papuan scorpionfish (Scorpaenopsis papuensis) lies on a reef in Raja Ampat, Indonesia. This remote, tropical region is home to extraordinary marine biodiversity.
Colorful lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.
Bright sunlight shines down on lily pads growing along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.
A colorful and healthy coral reef thrives in shallow water in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its 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 warty frogfish (Antennarius maculatus) is well-camouflaged as it waits to ambush prey on a reef in Komodo National Park, Indonesia.
Detail of an encrusting sponge growing on a coral reef in Komodo National Park, Indonesia.
A baby broadclub cuttlefish (Sepia latimanus) hovers in Lembeh Strait, Indonesia.
A beautiful feather duster worm, Bispira sp., grows on a coral reef in Alor, Indonesia.
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 cluster of colorful tunicates grow on a coral reef amid the remote, tropical islands of Raja Ampat, Indonesia.
A magnificent humpback whale, Megaptera novaeangliae, swims in the clear, blue waters of the Caribbean Sea.
Small cardinalfish hover amid mangrove prop roots in a remote part of 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.
A school of lined sweetlips, Plectorhinchus lineatus, swim above a healthy coral reef in Raja Ampat, Indonesia.
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.
Sunlight shines on beautiful corals thriving among the scenic islands of Raja Ampat, Indonesia.
A beautiful coral reef thrives around an island in a remote part of Raja Ampat, Indonesia.
A beautiful coral reef thrives amid the tropical islands of 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 coral reef grows amid the tropical islands of Raja Ampat, Indonesia.
A velvetfish, Paraploactis sp., waits for prey to swim by in Lembeh Strait, Indonesia.
Flamboyant cuttlefish embryos, Metasepia pfefferi, wait to hatch from their eggs on the sandy seafloor in Lembeh Strait, Indonesia.
A well-camouflaged tasselled wobbegong, Eucrossorhinus dasypogon, lies on the seafloor in 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.
Detail of a colonial tunicate growing on a coral reef in Komodo National Park, Indonesia.
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.
A spotted porcelain crab, Neopetrolisthes maculatus, snuggles into its host anemone in Komodo National Park, Indonesia.
A banded pipefish hovers above the substrait where it lives, Anilao, Philippines.
A young sea lion plays under the an oil rig platform, Southern California.
A scorpionfish sits on a reef with a big frown, Red Sea, Egypt.
A pregnant pygmy seahorse clings to a frond of a gorgonian fan, Anilao, Philippines.
The ocean is beautiful just under the surface near the desolate desert of Egypt.
Schooling fish in vibrant yellow hover over a coral reef in Raja Ampat, Indonesia.
A large crocodile lurks on the bottom of the sea, Caribbean Sea, Mexico.
A crocodile stalking its prey, Caribbean Sea, Mexico.
A crocodile approaches slowly over the sand, Caribbean Sea, Mexico.
Crocodile under water, Caribbean Sea, Mexico.
An oceanic whitetip shark approaches from the blue waters around Elphinstone, Red Sea.
A larval lionfish floats in the open ocean as plankton, Anilao, Philippines.
A sea spider hunts in coral polyps for its dinner, Anilao, Philippines.
A tiny hard coral crab can be found burrowing in between the polyps of the coral, Anilao, Philippines.
A snail about the size of a coin generally lives under the sand but comes out at night to feed, Anilao, Philippines.
Blacktip reef sharks patrol the shallow waters around a small island in Tahiti, French Polynesia.
A honeycomb eel emerges from its den and appears to smile, Maldives.
Sea anemone, Bohol Sea, Philippines.
Eye close-up on a crocodile flathead, New Ireland, Papua New Guinea.
Spotted porcelain crab, New Ireland, Papua New Guinea.
Underwater mermaid statue at Grand Cayman island.
Brittle Star on sponge, Belize.
Extreme close-up showing the detail of Mushroom coral, Indonesia
Male great white shark, Guadalupe Island, Mexico.
Underwater clownfish in anemone at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia
California sea lion (Zalophus californianus), with snorkeler at Los Islotes, Baja California Sur, Mexico, North America
California sea lion (Zalophus californianus), with photographer at Los Islotes, Baja California Sur, Mexico, North America
California sea lion (Zalophus californianus), with photographer at Los Islotes, Baja California Sur, Mexico, North America
California sea lion (Zalophus californianus), with snorkeler at Los Islotes, Baja California Sur, Mexico, North America
Half above and half below view of coral reef 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
Close-up of a spiny lobster, Caribbean Sea, Central America
Purple stove-pipe sponge (Aplysina archeri), with boat in background, Curacao.
A red, white and yellow Christmas tree worm (Spirobranchus giganteus), on coral, Curacao.
Goldentail moray eel (Gymnothorax miliaris), in coral reef, Curacao.
Chain moray eel (Echidna catenata), in coral reef, Curacao.
A green sea turtle (Chelonia mydas) in the sea grass, Saint Croix, U.S. Virgin Islands.
The shell of a green sea turtle (Chelonia mydas) swimming to the surface, Saint Croix, U.S. Virgin Islands.
The face of a green sea turtle (Chelonia mydas), Saint Croix, U.S. Virgin Islands.
Headshot of a seaweed blenny (Parablennius marmoreus).
Christmas tree worms (Spirobranchus giganteus) on brain coral, Saint Croix, U.S. Virgin Islands.
Head of a goldentail moray eel (Gymnothorax miliaris).
Lined seahorse (Hippocampus erectus).
Comb jelly in blackwater dive at night, West Palm Beach, Florida.
Tiger shark swimming over sand, Tiger Beach, Bahamas.
Green sea turtle with remora on back, Tiger Beach, Bahamas.
Great hammerhead shark turning, Tiger Beach, Bahamas.
Grean sea turtle with reflection in surface, Tiger Beach, Bahamas.
Green sea turtle swimming on the ocean floor, Tiger Beach, Bahamas.
Garibaldi fish on black background, Tiger Beach, Bahamas.
Great hammerhead shark and tiger shark, Tiger Beach, Bahamas.
Great hammerhead shark, Tiger Beach, Bahamas.
Front view of a tiger shark, Tiger Beach, Bahamas.
Reef shark, Tiger Beach, Bahamas.
Front view of a tiger shark, Tiger Beach, Bahamas.
Scuba divers interacting with a pair of tiger sharks, Tiger Beach, Bahamas.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
Two sheephead (Semicossyphus pulcher) In a kelp forest, Catalina Island, California.
A Caribbean reef squid on a deepwater night dive in West Palm Beach, Florida.
A starfish with spiny sea urchins at Quadra Island, British Columbia in Canada.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.