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X-ray image of a longnose butterflyfish
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X-Ray Image of a Longnose Butterflyfish

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The Belize Barrier Reef Reserve System consists of the largest barrier reef in the northern hemisphere, offshore atolls, and several hundred sand cays, mangrove forests, coastal lagoons, and estuaries. The system's seven sites illustrate the evolutionary h
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Belize Barrier Reef Reserve System

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Pink crustose algae covers the surface of a rock.
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Encrusting Pink Algae and a Seastar

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A bull shark's ability to prey on many different species is helped by its capacity to survive in both freshwater and saltwater.
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Swinging for Bull Sharks

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The Everglades National Park in the United States was inscribed on the World Heritage List in 1979. This site is a unique ecosystem created by a shallow, "imperceptible river" 50 miles wide, flowing slowly south to the tip of Florida. The exceptional varie
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Everglades National Park, United States

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Dr. Clyde Roper (rear) and museum specialist Mike Sweeny examine a giant squid specimen.
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Studying Giant Squid

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A puffin sits on a rock next to a puffin decoy.
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Puffin and Decoy

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Fish swim around the wreck of the HMT Bedfordshire, an Arctic fishing trawler that was converted into an anti-submarine warship during World War II, and sunk off the coast of North Carolina.
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Fish Swim Around Shipwreck

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Squid expert Dr. Clyde Roper examines specimens stored in jars in the Smithsonian collection.
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Dr. Clyde Roper

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A couple inches wide and up to ten feet long, the bobbit worm stays hidden under tropical sands with just its five antennae poking out—waiting for prey to swim by.
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The Bobbit Worm

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Syllid fireworms can be found mainly on the seafloor, but they switch to a planktonic form to reproduce, where the females use bioluminescent signals.
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Syllid Fireworms

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Two Southern Resident killer whales.
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Southern Resident Killer Whales

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